Relevant bibliographies by topics / SCIENCE / Physics / Magnetism / Dissertations / Theses
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Dissertations / Theses on the topic 'SCIENCE / Physics / Magnetism'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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1

Hagelberg, Frank. "Magnetism in Carbon Nanostructures." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etsu_books/151.

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Magnetism in carbon nanostructures is a rapidly expanding field of current materials science. Its progress is driven by the wide range of applications for magnetic carbon nanosystems, including transmission elements in spintronics, building blocks of cutting-edge nanobiotechnology, and qubits in quantum computing. These systems also provide novel paradigms for basic phenomena of quantum physics, and are thus of great interest for fundamental research. This comprehensive survey emphasizes both the fundamental nature of the field, and its groundbreaking nanotechnological applications, providing
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2

Murphy, Martin Joseph 1970. "The electrification of Florida thunderstorms." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290670.

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Six thunderstorms that occurred at the NASA Kennedy Space Center, Florida, have been studied in an attempt to characterize their electrical structure and electrification. Ground-based measurements of the cloud electric fields, the locations of lightning VHF radio sources, cloud-to-ground lightning strike points, and dual-polarization radar data were used in this study. Changes in the electric field due to lightning were used to determine the locations and magnitudes of changes in cloud charge. The fields themselves were used to compute displacement current densities following lightning flashes
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3

Gibbard, Seran Gwen 1967. "Lightning in the solar system." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290640.

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Lightning, a familiar phenomenon on Earth, may also occur at other times and locations in our solar system. It has been suggested as a mechanism for forming chondrules, millimeter-sized beads of glassy silicate found in primitive meteorites formed in the early solar system 4.5 billion years ago. It has also been detected in Voyager images of Jupiter, and there is evidence that it may occur on other planets as well, including Venus, Saturn and Neptune. The mechanism believed to produce lightning discharges on Earth, and possibly other planets, is charge production by collisions of ice particles
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4

Philippi, Kristen Haber. "An Examination of Student Understanding of the Use of Models in Science and Conceptual Understanding of Electricity and Magnetism." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1114.

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The purpose of this study is to inform instruction by increasing the body of knowledge regarding the relationship between college physics students' knowledge about models in science and their conceptual understanding with regard to electricity and magnetism. The data for this study was obtained through the administration of two instruments: Conceptual Survey of Electricity and Magnetism, a multiple choice assessment, and Student Understanding of Models in Science, a Likert-scale survey. Both traditional statistics and an innovative technique called Model Analysis were used to analyze the data.
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5

Roseman, Mark A. "Low temperature magnetic force microscopy studies of superconducting niobium films." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38266.

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Low temperature magnetic force microscopy studies of superconducting niobium films have been undertaken with the goal of studying the interplay between artificial pinning centers and magnetic vortices.<br>Measurements were performed using a custom built low temperature magnetic force microscope, capable of operation at temperatures ranging from 4.2 K to room temperature. Special attention has been paid to optimizing the instrumentation through a detailed study of the noise characteristics, with particular emphasis placed on achieving a large signal-to-noise ratio and corresponding high force g
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6

Jiao, Jun 1957. "Comparative study of the properties, morphologies, and structures of carbon nanoclusters prepared by different methods." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282358.

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This study was undertaken to gain a greater understanding of the growth mechanism of carbon nanoclusters. A set of carbon nanocluster samples prepared by three different methods and under different conditions was characterized with respect to morphology, structure, composition, and related properties. Electron microscopy characterization techniques were used to identify these features. The carbon nanoclusters prepared by conventional arc discharge, modified arc discharge, and catalytic CO disproportionation appear quite different on the surface, but have features in common that this study emph
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7

Christiansen, David A. "Investigation of magnetic proximity effect in ferromagnet/superconductor thin films by low temperature Magneto Optical Kerr Effect measurement." California State University, Long Beach, 2013.

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8

Wang, Haiping 1969. "Studies of compounds related to Cu(In-xGax)Se solar cells." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38434.

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Crystals of Cu(In1-xGax)3Se 5 were grown by the horizontal and vertical Bridgman methods. A non-contact carbon coating was used to avoid the adhesion between Cu(In1-x Gax)3Se5 ingots and the inner ampoule walls. The composition along and across the as grown ingots with different starting Ga contents was analyzed and the results were interpreted by the established pseudobinary phase diagrams. Results of XRD confirmed that the lattice constants of the Cu(In1-xGax)3Se 5 crystals varied linearly with the Ga content. Results of X-ray Laue back-reflection showed that the Cu(In1-xGax) 3Se5 ingots con
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9

Mercado, Sanchez Gema Alejandrina. "Modeling hotspot dynamics in microwave heating." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/289032.

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The formation and propagation of hotspots in a cylindrical medium that is undergoing microwave heating is studied in detail. A mathematical model developed by Garcia-Reimbert, C., Minzoni, A. A. and Smyth, N. in Hotspot formation and propagation in Microwave Heating, IMA, Journal of Applied Mathematics (1996), 37, p. 165-179 is used. The model consists of Maxwell's wave equation coupled to a temperature diffusion equation containing a bistable nonlinear term. When the thermal diffusivity is sufficiently small the leading order temperature solution of a singular perturbation analysis is used t
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10

Belyea, Dustin David. "Analysis of Critical Behavior in Magnetic Materials." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5180.

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This work contains a broad study of a variety of magnetic materials undergoing second order phase transitions. In general this leads to an overall increase in information and analytical methods to further the field of magnetocalorics. Specifically, critical aspects of magnetocaloric materials were compared within systems in relation to structure, stoichiometry, magnetic minority phases and magnetic contaminants. Detailed analyses were developed to quantify techniques which were in the past used mainly in a qualitative way, leading to a more complete understanding of how critical phenomena impa
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11

Ruskell, Todd Gary 1969. "Semiconductor modification and characterization with a scanning probe microscope." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282152.

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The capabilities of a commercially available atomic force microscope system have been expanded to include sub-picoampere measurements of local surface conductivity. This multiple mode analysis tool is capable of providing local I/V curves, current maps at a constant voltage, or voltage maps at a constant current, simultaneously with the usual topographic data obtained for a given sample. The resulting electrical maps and local I/V curves from several samples are presented, and their interpretation discussed. Additionally, this system has been used for field-induced silicon oxide growth and, fo
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12

Ball, Molly R. "First Principles Study of Electronic and Magnetic Structures in Double Perovskites." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483702986122186.

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13

Krantz, Lina. "Magnetism och friktion i förskolan : Femåringar utforskar fysikaliska fenomen tillsammans med Tiggy testar." Thesis, Karlstads universitet, Institutionen för pedagogiska studier, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-37063.

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The purpose of this study was to increase knowledge how preschool children act to explore and managing scientific phenomena. The phenomenon´s that was chosen for this study is magnetism and friction, the study was conducted through qualiative semi-structured interviews in group. By interviewing the children while the experiments were carried out their thoughts and reflections about the chosen phenomena made visible. To deepen the children´s learning in a pleasurable and inspiring way Information and Communication Technology (ICT) was intergraded, with help of a computer where the children got
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14

Bultmark, Fredrik. "Distorted Space and Multipoles in Electronic Structure Calculations." Doctoral thesis, Uppsala universitet, Institutionen för fysik och materialvetenskap, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9553.

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This thesis concerns methods for electronic structure calculations and some applications of the methods. The augmented planewave (APW) basis set and it’s relatives LAPW (linearised APW) and APW+lo (local orbitals) have been widely used for electronic structure calculations. Here a modification of the APW basis set based on a transformation of the basis functions from a curvilinear coordinate system. Applications to a few test systems show that the modified basis set may speed up electronic structure calculations of sparse systems. The local density approximation (LDA) is used in density functi
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15

Ma, Yingqiao. "A Two-dimensional Semiconducting GaN-based Ferromagnetic Monolayer." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1541513207541646.

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16

Schneider, Claus M., Daniel E. Bürgler, Peter M. Oppeneer, et al. "Quantitative characterization of nanoscale polycrystalline magnets with electron magnetic circular dichroism." nature publishing group, 2014. http://hdl.handle.net/2237/20835.

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17

Hanson, Kristina, and Emma Nordlund. "Experimentera mera! : En designbaserad studie med utgångspunkt i de fysiska krafterna gravitation, magnetism, och statisk elektricitet." Thesis, Karlstads universitet, Fakulteten för humaniora och samhällsvetenskap (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-85699.

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Abstract The purpose of the study is to contribute knowledge about working with physics in preschool, and how the youngest children perceive natural science phenomena, and to make visible how educators work with the subject of physics. Our focus is forces, and we therefore designed and allowed the children and educators to conduct experiments on, gravity, static electricity and magnetism. The study involved 19 children, aged 1 to 3 and 5 educators.  The data collection method for this study consists of observations of the children when they experiment, as well as semi-structured with the educa
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18

Mishra, Rohan. "First Principles Study of Double Perovskites and Group III-V Compounds." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345489862.

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19

Abdallah, Iman. "Spin dynamics and structural modifications of Co2MnSi Heusler alloys by helium ions irradiation." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30079/document.

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L'électronique de spins est basée sur le principe que l'électron possède une charge mais aussi un spin. Cette nouvelle électronique est née de de la découverte de la magnétorésistance géante (GMR) par A. Fert et P. Grunberg en 1988 qui furent récompensés par le prix Nobel de physique en 2007. Ceci a révolutionné le domaine des capteurs de champ magnétiques ainsi que le stockage at le traitement de données. Les mécanismes de base de la GMR et la Magnéto Résistance Tunnel (TMR) repose sur la polarisation de spin, qui correspond à l'orientation préférentielle dans une direction du spin des électr
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20

Lukawska, Anna Beata. "THERMAL PROPERTIES OF MAGNETIC NANOPARTICLES IN EXTERNAL AC MAGNETIC FIELD." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1401441820.

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21

Noble, Christopher John 1967. "Applications of magnetic resonance in materials science and solid state physics." Monash University, Dept. of Physics, 2001. http://arrow.monash.edu.au/hdl/1959.1/9064.

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22

Parsa, Nitin. "MILLIMETER-WAVE FARADAY ROTATION FROM FERROMAGNETIC NANOWIRES AND MAGNETOELASTIC MATERIALS." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1561468969375731.

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23

Citati, Andrea. "Systematic synthesis and magnetic characterization of palladium nanoparticles with hexanethiolate and phenylethanethiolate ligands." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10159001.

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<p> Palladium nanoparticles have been synthesized using a systematic variation of the two-phase Burst-Schiffrin reaction to specifically tailor their physical properties. Furthermore, hexanethiolate and phenylethanethiolate ligands have been added to kinetically stabilize the nanoparticles and as a consequence the magnetic properties have been altered due the change in ligand-nanoparticle exchange interaction. The magnetic properties of the nanoparticles were then studied via the vibrating sample magnetometer and subsequently compared with similar experiments in the nanomagnetism literature.
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24

Johnsen, Sebastian. "Low-dimensional Magnetism in Novel 2D Honeycomb Materials." Thesis, KTH, Tillämpad fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-300902.

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A Kitaev quantum spin liquid is a phase of matter predicted to host excitations that can be used to preform fault-tolerant quantum computation. Though the theoretical prediction of such a state is on firm footing, its realisation in real materials has proven to be elusive. Recent developments have suggested honeycomb materials consisting of 3d transition metal ions as possible candidates. The focus of this thesis is the magnetic properties of one such material, K2Ni2–xCoxTeO6. It is part of a family of layered two dimensional materials consisting of honeycomb structured transition metal layers
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25

Osorio, Guillén Jorge Mario. "Density Functional Theory in Computational Materials Science." Doctoral thesis, Uppsala University, Department of Physics, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4496.

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<p>The present thesis is concerned to the application of first-principles self-consistent total-energy calculations within the density functional theory on different topics in materials science.</p><p>Crystallographic phase-transitions under high-pressure has been study for TiO2, FeI2, Fe3O4, Ti, the heavy alkali metals Cs and Rb, and C3N4. A new high-pressure polymorph of TiO2 has been discovered, this new polymorph has an orthorhombic OI (Pbca) crystal structure, which is predicted theoretically for the pressure range 50 to 100 GPa. Also, the crystal structures of Cs and Rb metals have been
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26

Backer-Meurke, Fredrik. "Finite-size effect in CoAlZr/AlZr multilayers." Thesis, Uppsala universitet, Materialfysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-355721.

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The structural and magnetic properties of amorphous Cox(Al80Zr20)1-x multilayers with varying thicknesses of the magnetic bilayers have been investigated. The reduction of the thickness causes a reduction of the critical temperature, Tc, this is known as the finite-size effect. The multilayers were grown using DC magnetron sputtering, co-sputtering was used with cobalt and an Al80Zr20 alloy target to create an amorphous CoAlZr alloy. The total thickness of the multilayers was chosen to be held constant at 60 nm and the Al80Zr20 spacing layers were thick enough to suppress any interlayer exchan
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27

Siddiqui, Saima Afroz. "Magnetic domain wall devices : from physics to system level application." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/121727.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Spintronics promises intriguing device paradigms where electron spin is used as the information token instead of its charge counterpart. Spin transfer torque-magnetic random access memory (STT-MRAM) is considered one of the most mature nonvolatile memory technologies for next generation computers. Spin based devices show promises also for beyond-CMOS, in memory computing and neuromorphic accele
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28

Mafi, Mariyeh. "Magnetic Characteristics of the Manganese-/Iron-Phthalocyanine Interface." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10639509.

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<p> The magnetic properties of Metallo-organic heterostructure interfaces are studied. These heterostructures are built with manganese phthalocyanine (MnPc) and iron phthalocyanine (FePc). Previously, the powder of each material is reported to be an Ising-like chain magnet with Arrhenius relaxation. The relaxation is slow enough to exhibit magnetic hysteresis at low temperatures. Each layer of the heterostructure is investigated separately by depositing a thin film of either iron phthalocyanine (FePc) or manganese phthalocyanine (MnPc) on a Silicon substrate heated to 150 &deg;C. FePc thin fil
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29

Baias, Maria Antoaneta [Verfasser]. "Science and history explored by nuclear magnetic resonance / vorgelegt von Maria Antoaneta Baias." Aachen : Shaker, 2009. http://d-nb.info/1002320704/34.

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30

Ekstrand, Paul Daniel. "Magnetic relaxation in iron phthalocyanine thin films." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1604875.

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<p> Magnetic relaxation describes the process by which a magnetic system prepared in a non-equilibrium state returns to an equilibrium distribution. Thin film samples of iron phthalocyanine (FePc) are deposited onto heated substrates. Substrates are made of either silicon, or smooth gold on silicon. FePc molecules self-assemble into small crystalline structures. Due to the planar shape of the molecules, iron chains are formed. The length of these chains depends on the deposition temperature of the sample. Here, FePc thin films are saturated in an applied magnetic field of 3 T at low temperatur
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31

Beach, Alexander R. "Fabrication of Self-Assembled Nanosphere Templates to Investigate the Magnetic Behavior of Permalloy Cap Layers." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10841251.

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<p> The Langmuir-Blodgett deposition process is investigated for creating polystyrene nanosphere monolayers on a hydrophilic silicon substrate. The monolayers are fabricated over areas ~1 cm<sup>2</sup> and sputter coated with 100&Aring; of permalloy. The quality of the monolayers is analyzed with optical microscope image processing, and 2D Fourier transforms of electron microscope images. The magnetic switching behavior of the sputtered samples is measured using an alternating gradient magnetometer, and compared to completely flat permalloy. The magnetic hysteresis measurements are done at di
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32

Goldberg, Brian 1979. "Magnetic properties of an isolated quantum dot." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87370.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2003.<br>Includes bibliographical references (p. 121-123).<br>by Brian Goldberg.<br>M.Eng.<br>S.B.
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33

Contu, Andrea. "The measurement of the production cross section ratio of identified hadrons and the calibration of the magnetic distortion in RICH1 at LHCb." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:842ec7be-36e9-4abc-a810-2325074aa5f7.

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Physics measurements at the LHC rely on the imulation of the proton-proton interaction to estimate detector performance and physics ackgrounds. Therefore, a good understanding of ll the processes involved is crucial to the final precision of any measurement. Monte Carlo event generators try to provide a realistic description of the proton-proton collision by combining the theoretical models describing different stages of the interaction process. Within this framework, the baryon number transport and the hadronisation mechanism are currently described by phenomenological models that need input
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34

Hopper, Melanie Sarah. "Magnetic surface relaxation and reconstruction phenomena in frustrated magnetic systems." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1423/.

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This thesis is concerned with magnetism at the surfaces of frustrated magnets, and in particular with magnetism on face-centred cubic (FCC) lattice systems. Normally, magnets do not react to a surface. Frustrated magnets do, however, and we consider two cases: Magnetic relaxation and the more unusual magnetic reconstruction phenomenon. Magnetic relaxation involves the extinction near the surface of a magnetic order that is present in the bulk and exists as a type of magnetic domain wall. Calculations of the ground state configuration of a semi-infinite system of uranium dioxide, an FCC triple-
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35

Ouahioune, Nedjma. "MOKE set-upto measure magnetic anisotropy : MOKE set-upto measure magnetic anisotropy." Thesis, Uppsala universitet, Materialfysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-414388.

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36

Galicia, Felicisimo. "Plasma wave induced chaos in a magnetic field." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38863.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.<br>Includes bibliographical references (leaf 125).<br>by Felicisimo Galicia.<br>B.S.<br>M.Eng.
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37

Ngo, Duc-The. "Lorentz TEM characterisation of magnetic and physical structure of nanostructure magnetic thin films." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1841/.

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The work presented in this thesis is an investigation which aims to quantitatively characterise the physical microstructure, magnetic structure and micromagnetic behaviour of nanostructured thin films for magnetic recording and spintronics application. The nanostructures in the present work involve continuous and patterned thin films. Chapters 1, 2, and 3 present the overview backgrounds directly relevant to the work. Chapter 4 focuses on vortex structure in magnetic nanodots. The results confirm that the behaviour of the vortex can be modified by changing the edge geometry of the dots. It is
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38

Blais, Noël. "Modified fermi-eyges electron scattering in tissue equivalent media." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70178.

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A theoretical and experimental study of the spatial spread of electron dose distributions for pencil and broad electron beams in various media is presented. We discuss in detail two methods for measurement of electron beam kinetic energies, describe our technique for the measurement of the optical density versus dose relationship for radiographic films, and present the experimental set-up for the measurement of the spatial spread of electron dose distributions for pencil and broad electron beams.<br>The Fermi-Eyges theory for the small angle multiple Coulomb scattering describes the spatial el
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39

Boardman, Richard P. "Computer simulation studies of magnetic nanostructures." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/45942/.

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Scientific and economic interest has recently turned to smaller and smaller magnetic structures which can be used in hard disk drives, magnetoresistive random access memory (MRAM), and other novel devices. For nanomagnets the geometric shape of the object becomes more important than other factors such as magnetocrystalline anisotropy . the smaller the object, the more strongly the shape anisotropy affects the hysteresis loop. We investigate the micromagnetic behaviour of ferromagnetic samples of various geometries using numerical methods. Finite differences and finite elements are used to solv
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40

Pechkis, Daniel Lawrence. "First-principles Calculations of Nuclear Magnetic Resonance Chemical Shielding Tensors in Complex Ferroelectric Perovskites." W&M ScholarWorks, 2011. https://scholarworks.wm.edu/etd/1539623590.

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Nuclear magnetic resonance (NMR) spectroscopy is one of the most important experimental probes of local atomistic structure, chemical ordering, and dynamics. Recently, NMR has increasingly been used to study complex ferroelectric perovskite alloys, where spectra can be difficult to interpret. First-principles calculations of NMR spectra can greatly assist in this task. In this work, oxygen, titanium, and niobium NMR chemical shielding tensors, s&d4; , were calculated with first-principles methods for ferroelectric transition metal prototypical ABO3 perovskites [SrTiO3, BaTiO 3, PbTiO3 and Pb
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41

Gauvin, Alain. "Geometrical distortion of magnetic resonance images." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60675.

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The problem of geometrical distortion in MR images is addressed in the context of the applicability of stereotactic techniques. For this purpose, the distortion of phantom images is measured at various readout bandwidths and the spatial linearity is evaluated in view of the use of a stereotactic frame. The presence of a contribution to the overall distortion of non-linear magnetic gradients is shown from the data, although the distortion observed seems to be mostly attributable to the main field inhomogeneity. The specific problems of distortion of the fiducial markers due to bulk magnetic sus
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42

Hirschberger, Maximilian Anton. "Quasiparticle Excitations with Berry Curvature in Insulating Magnets and Weyl Semimetals." Thesis, Princeton University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10286472.

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<p> The concept of the geometric Berry phase of the quantum mechanical wave function has led to a better theoretical understanding of natural phenomena in all fields of fundamental physics research. In condensed matter physics, the impact of this theoretical discovery has been particularly profound: The quantum Hall effect, the anomalous Hall effect, the quantum spin Hall effect, magnetic skyrmions, topological insulators, and topological semimetals are but a few subfields that have witnessed rapid developments over the three decades since Michael Berry's landmark paper. In this thesis, I will
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43

Hoke, Harris Clarence Jr. "Nuclear magnetic resonance studies of amorphous nickel-zirconium hydrides." W&M ScholarWorks, 1991. https://scholarworks.wm.edu/etd/1539623803.

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This research deals with one aspect of the scientific field of hydrogen in metals. The study of hydrogen in metals is technologically important for many reasons, among them is the use of hydrogen in metals to store energy. Hydrogen related energy technology is particularly attractive because hydrogen can be extracted from water, our most abundant resource, and can be used without any pollution. Metal hydrides may one day be widely used for automotive propulsion in cars, in batteries, and many other energy conversion devices. Amorphous NiZr is particularly interesting for hydrogen storage becau
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44

Safiullin, Kayum. "Magnetic Resonance of Hyperpolarised Helium-3 at Low Magnetic Fields." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00753219.

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Dans ce travail nous avons étudié le problème du rapport signal à bruit (RSB) en IRM à très bas champ magnétique et exploré des applications potentielles en utilisant du gaz 3He hyperpolarisé. Nous avons comparé deux méthodes d'élargissement de bande passante sans perte de RSB : une contre-réaction et un couplage inductif de la détection. Nous avons mis en œuvre la contre-réaction, plus appropriée à très bas champ. Des mesures d'atténuation par diffusion dans un gaz d'3He en géométrie cylindrique ont été faites par échos multiples de spin ou de gradient dans une large gamme de conditions corre
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45

Collins-McIntyre, Liam James. "Transition-metal doped Bi2Se3 and Bi2Te3 topological insulator thin films." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:480ea55a-5cac-4bab-a992-a3201f10f4c5.

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Topological insulators (TIs) are recently predicted, and much studied, new quantum materials. These materials are characterised by their unique surface electronic properties; namely, behaving as band insulators within their bulk, but with spin-momentum locked surface or edge states at their interface. These surface/edge crossing states are protected by the underlying time-reversal symmetry (TRS) of the bulk band structure, leading to a robust topological surface state (TSS) that is resistant to scattering from impurities which do not break TRS. Their surface band dispersion has a characteristi
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König, Tobias. "Probing magnetic Dynamics inNanoarrays using AC susceptibility." Thesis, Uppsala universitet, Materialfysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-415073.

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This project revised a magneto-optical ac susceptometer aiming to improve the experimentalapproach to investigate the magnetization dynamics of magnetic nano arrays.First the experimental setp was equipped with a new Helmholtzcoil which enables strongerAC magnetic eld compared to the installed coils on the system. That includes i.e. higherRMS magnetic eld amplitudes and a higher cut-o frequency in order to increase thefrequency range for magnetization dynamic measurements. Therefore dierent coil prototypeswere fabricated and tested in table top experiments using dierent additive manufacturingm
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Repa, Kristen Lee Stojak. "Confinement Effects and Magnetic Interactions in Magnetic Nanostructures." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6573.

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Multifunctional nanocomposites are promising for a variety of applications ranging from microwave devices to biomedicine. High demand exists for magnetically tunable nanocomposite materials. My thesis focuses on synthesis and characterization of novel nanomaterials such as polymer nanocomposites (PNCs) and multi-walled carbon nanotubes (MWCNTs) with magnetic nanoparticle (NP) fillers. Magnetite (Fe3O4) and cobalt ferrite (CoFe2O4) NPs with controlled shape, size, and crystallinity were successfully synthesized and used as PNC fillers in a commercial polymer provided by the Rogers Corporation a
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Chaturvedi, Anurag. "Novel Magnetic Materials for Sensing and Cooling Applications." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3040.

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The overall goals of the present PhD research are to explore the giant magnetoimpedance (GMI) and giant magnetocaloric (GMC) effects in functional magnetic materials and provide guidance on the optimization of the material properties for use in advanced magnetic sensor and refrigeration applications. GMI has attracted growing interest due to its promising applications in high-performance magnetic sensors. Research in this field is focused on the development of new materials with properties appropriate for practical GMI sensor applications. In this project, we have successfully set up a new mag
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Macke, Robert J. "Survey of meteorite physical properties density, porosity and magnetic susceptibility." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4653.

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Grain density and magnetic susceptibility, which have been shown to distinguish H, L and LL ordinary chondrites, also may distinguish shergottites, nakhlites and chassignites from each other, but the two groups of enstatite chondrites (EH and EL) remain indistinguishable in these properties. H chondrite finds exhibit a slight negative trend in porosity with increasing petrographic type, and all chondrite falls together exhibit a pronounced negative trend in porosity spanning all petrographic types. The overall trend corresponds roughly to a positive trend in porosities with respect to both deg
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Zubayer, Anton. "Ion Dynamics & Magnetic Order in 2D Honeycomb Materials." Thesis, KTH, Tillämpad fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280781.

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