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Tesis sobre el tema "Muon Spin Relaxation spectroscopy"

Autor: Grafiati

Publicado: 10 de marzo de 2023

Última modificación: 31 de julio de 2025

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1

Sadrollahi, Elaheh [Verfasser], and F. J. [Akademischer Betreuer] Litterst. "Fe1-xCuxCr2S4 Studied by Mössbauer Spectroscopy and Muon Spin Rotation and Relaxation / Elaheh Sadrollahi ; Betreuer: F. J. Litterst." Braunschweig : Universitätsbibliothek Braunschweig, 2018. http://d-nb.info/1174702427/34.

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2

Kamusella, Sirko [Verfasser], Hans-Henning [Akademischer Betreuer] [Gutachter] Klauß, and Vadim [Gutachter] Ksenofontov. "Electronic phase diagrams and competing ground states of complex iron pnictides and chalcogenides : A Mössbauer spectroscopy and muon spin rotation/relaxation study / Sirko Kamusella ; Gutachter: Hans-Henning Klauß, Vadim Ksenofontov ; Betreuer: Hans-Henning Klauß." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/112910513X/34.

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3

Goltz, Til. "On the electronic phase diagram of Ba1-xKx(Fe1-yCoy)2As2 and EuFe2(As1-xPx)2 superconductors." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-192059.

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In this thesis, I study the electronic and structural phase diagrams of the superconducting 122 iron pnictides systems Ba1-xKx(Fe1-yCoy)2As2 and EuFe2(As1-xPx)2 by means of the local probe techniques 57Fe Mössbauer spectroscopy (MS) and muon spin relaxation (muSR). For both isovalent substitution strategies - Co/K for Fe/Ba and P for As, respectively - the antiferromagnetic Fe ordering and orthorhombic distortion of the parent compounds BaFe2As2 and EuFe2As2 are subsequently suppressed with increasing chemical substitution and superconductivity arises, once long-range and coherent Fe magnetic

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4

Goltz, Til [Verfasser], Hans-Henning [Akademischer Betreuer] Klauß, and Jörg [Akademischer Betreuer] Fink. "On the electronic phase diagram of Ba1-xKx(Fe1-yCoy)2As2 and EuFe2(As1-xPx)2 superconductors : A local probe study using Mössbauer spectroscopy and Muon Spin Relaxation / Til Goltz. Betreuer: Hans-Henning Klauß. Gutachter: Jörg Fink." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://d-nb.info/1083463098/34.

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5

Steele, Andrew J. "Quantum magnetism probed with muon-spin relaxation." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:030d7e91-f38e-433f-9539-652b0f4996cc.

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This thesis presents the results of muon-spin relaxation (µ<sup>+</sup><abbr>SR</abbr>) studies into magnetic materials, and demonstrates how these results can be exploited to quantify the materials’ low moments and reduced dimensionality. Dipole-field simulations, traditionally used to estimate likely muon sites within a crystal structure, are described. A novel Bayesian approach is introduced which allows bounds to be extracted on magnetic moment sizes and magnetic structures—previously very difficult using µ<sup>+</sup><abbr>SR</abbr>—based on reasonable assumptions about positions in which

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6

Aston, Georgina Margaret. "Molecular dynamics with muon spin relaxation/rotation." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338062.

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7

Willis, Maureen. "Muon spin relaxation as a probe of electron spin relaxation in organic semiconductors." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/5392.

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The purpose of this thesis is to study the electron spin relaxation (eSR) in small organic molecular semiconductors using the muon spin relaxation (MuSR) technique. One of the inherent problems in utilising the spin degree of freedom is the lack of understanding of the fundamental mechanisms behind spin relaxation. Two interactions have been proposed as the dominant mechanisms behind the spin relaxation, the Hyper ne interaction (HFI) and the Spin Orbit (SO) interaction. There remains much debate over the models for these interactions and their exact role, a contention that drives the work car

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8

Williams, Robert Charles. "Correlated magnetic oxides studied using muon-spin spectroscopy." Thesis, Durham University, 2016. http://etheses.dur.ac.uk/11566/.

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This thesis is concerned with the application of muon-spin spectroscopy (muSR) in the study of correlated magnetic oxides. The results of four studies are presented, where muSR is used to provide insight into both the static and dynamic magnetic behaviours of the materials in question. The results of muSR measurements on the double perovskite compounds Sr2BOsO6 (B = Co, Fe, Y, In) are presented. The Co compound exhibits lattice-site-specific ground states and spin dynamics with two distinct, partially ordered antiferromagnetic states encountered upon cooling from room temperature. Here, and al

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9

Lancaster, Tom. "Muon-spin relaxation and its application to magnetic systems of differing dimensionality." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409811.

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10

Chen, Karen. "Studies on LiYRF." Thesis, Boston College, 2010. http://hdl.handle.net/2345/1561.

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Thesis advisor: Michael Graf<br>Senior thesis on muon spin relaxation study of LiHoXY1-XF4 and semi-adiabatic specific heat experiment on LiTb0.40Y0.60F4<br>Thesis (BS) — Boston College, 2010<br>Submitted to: Boston College. College of Arts and Sciences<br>Discipline: Physics Honors Program<br>Discipline: Physics

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11

Shermadini, Zurab. "Iron based pnictide and chalcogenide superconductors studied by muon spin spectroscopy." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-148934.

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In the present thesis the superconducting properties of the Iron-based Ba_{1-x}Rb_{x}Fe_{2}As_{2} arsenides, and A_{x}Fe_{2-y}Se_{2} (A = Cs, Rb, K) chalcogenides are investigated by means of Muon Spin Rotation Spectroscopy. The temperature and pressure dependence of the magnetic penetration depth is obtained form muSR experiments and analyzed to probe the superconducting gap-symmetries for each samples. The Ba_{1-x}Rb_{x}Fe_{2}As_{2} system is described within the multi-gap s+s-wave scenario and results are discussed in the light of the suppression of inter-band processes upon hole doping.

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12

Möller, Johannes S. "Muon-spin relaxation and its application in the study of molecular quantum magnets." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:7f19318c-a78e-4499-803b-b93df5ee169a.

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This thesis is concerned with the muon-spin relaxation (musr) technique and its application in the study of a number of molecular magnetic systems that may be driven through a quantum phase transition at low temperatures through the application of a magnetic field or hydrostatic pressure. Musr is a highly sensitive probe of magnetism, but its utility can be severely limited by the lack of knowledge of the muon implantation site and the extent to which the muon perturbs its host. In a system of ionic fluorides, where partial information about the muon site is experimentally available, I demonst

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13

Yen, Hon Kit. "Theoretical spin dynamics on muonium level-crossing resonance." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28531.

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Redfield's theory and the theory of master equations have been reviewed and their applications to muonium spin dynamics discussed. It was found that both theories are equivalent in the Markov limit. In some cases, analytical expressions for relaxation rates are found. In addition, Redfield's theory was applied to describe spin relaxation of muonium-substituted free radicals near level-crossing resonances. Theoretical predictions were compared with experimental data for the C₆F₆-Mu radical and the results suggest there are several relaxation mechanisms involved.<br>Science, Faculty of<br>Physi

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14

Lang, Franz. "Muon-spin relaxation and density functional techniques in the study of novel magnetic systems." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:869b716e-2a12-468b-a031-9bfd0078cdaa.

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The main focus of this thesis is the experimental muon-spin relaxation technique (μ+SR) and its application to study novel and unconventional magnetic behaviour. I present a range of experimental measurements which I supplement with theoretical calculations to remove the two main limitations inherent to μ+SR and thereby improve the understanding of the experimentally observed behaviour. Additionally, I investigate the potential effects of demagnetising fields on highfield μ+SR measurements. μ+SR employs positively charged muons as sensitive local magnetic probes but has the essential drawback

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15

Disseler, Steven Michael Thomas. "Magnetic Order in the Pyrochlore Iridates." Thesis, Boston College, 2013. http://hdl.handle.net/2345/3148.

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Thesis advisor: Michael J. Graf<br>This thesis is concerned with experimentally determining the magnetic and electronic states in a unique class of transition metal oxides known as the pyrochlore iridates, A₂Ir₂O₇ (A = Y or Rare earth). The extended nature of the 5d Ir orbitals in the iridates places these materials in a regime of intermediate electron correlation and large spin-orbit interaction such that this system may host several novel or topological states of matter which may be perturbed by incorporating different A-species. Additionally, the pyrochlore structure is geometrically frustr

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16

Jestadt, Thomas. "Muon studies of low-dimensional solid state systems." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301173.

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17

Creamer, N. J., L. E. Macaskie, P. Mikheenko, I. P. Mikheenko, S. P. Cottrell, and A. R. Williams. "Observation of the Curie Transition in Palladium Bionanomaterial Using Muon Spin Rotation Spectroscopy." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35339.

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Palladium bionanomaterial was manufactured using the sulfate-reducing bacterium, Desulfovibrio desulfuricans, to reduce soluble Pd(II) ions to cell-bound Pd(0). The material was examined using a Superconducting Quantum Interference Device (SQUID) to observe bulk magnetisation over the temperature range 10 – 300 K and by Muon Spin Rotation (μSR), which is a probe of the local magnetic environment inside the sample, over the temperature range 200 – 700 K. Results from SQUID were used to model the temperature dependence of ferromagnetic and paramagnetic components of the bulk magnetisation

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18

Wenner, Sigurd. "Transmission electron microscopy and muon spin relaxation studies of precipitation in Al–Mg–Si alloys." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23701.

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The Al–Mg–Si system is a heat-treatable class of aluminium alloys that gain their mechanical strength via precipitation hardening. The main hardening phases are precipitated as needle-shaped nano-sized particles from a solid solution of Mg, Si and other added elements. Transmission electron microscopy and muon spin relaxation was used to study precipitation and clustering in Al–Mg–Si alloys, varying the heat treatment and chemical composition in order to understand the kinetics of precipitation and the morphology, distribution, and atomic structure of hardening precipitates. Muons were found t

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19

Foronda, Francesca. "Muon spin spectroscopy and high magnetic field studies of novel superconductors and magnetic materials." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:55c7ed6b-af31-4b7b-8b64-217dcc6846ac.

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This thesis investigates a number of novel magnetic materials and high temperature superconductors using high-field magnetometry and muon spin spectroscopy (μSR). The main measurement techniques are briefly described and a study of the dimer material [Cu(pyrazine)(glycine)]ClO<sub>4</sub> is presented to demonstrate the use of the proximity detector oscillator as a susceptometer in high magnetic fields. μSR is a highly effective tool for probing magnetic order, spin freezing and spin dynamics. However, in some circumstances its performance may be impaired by the extent to which it pertur

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20

Bertin, Alexandre. "Geometrical frustration and quantum origin of spin dynamics." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GRENY014/document.

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Cette thèse se concentre sur l'étude de composés magnétiques géométriquement frustrés où les ions magnétiques se situent aux sommets d'un réseau de tétraèdres partageant leurs sommets: les composés pyrochlores. Deux familles de formule chimique R2M2O7, où R est un lanthanide et M= Ti, Sn, sont particulièrement intéressantes puisqu'elles présentent une grande variété d'états magnétiques exotiques. Premièrement, nous avons étudié le champ cristallin agissant au site de la terre rare dans l'approximation de Stevens où uniquement le terme fondamental est considéré. Un jeu unique de paramètres a ét

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21

Hodges, Alex Randall. "EXCITON SPIN RELAXATION IN ZNMNSE-BASED DIULUTE MAGNETIC SEMICONDUCTOR HETEROSTRUCTURES." University of Cincinnati / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin976201363.

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22

Groves, Ronald William. "O17 spin-lattice relaxation solid state NMR studies of pure and doped ices." Columbus, Ohio : Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1021903674.

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Thesis (Ph. D.)--Ohio State University, 2002.<br>Title from first page of PDF file. Document formatted into pages; contains xx, 128 p.; also contains graphics. Includes abstract and vita. Co-advisors: Charles H. Pennington and James V. Coe, Dept. of Chemistry. Includes bibliographical references (p. 124-128).

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23

Frassineti, Jonathan. "Evidence of a quantum entangled state between the muon spin and 51V nuclear spin (I=7/2) in A15 compounds." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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The purpose of this thesis is the study of the interaction at the atomic level between the positive muon μ+, with spin S = 1/2, and nuclei having spin I >1/2. Normally the μ+, a particle with a charge equal (in absolute value) to that of the electron and which interacts with the magnetic fields through its magnetic moment, can form a quantum entangled state when it is implanted between two nuclei with spin I=1/2, such as fluorine; this phenomenon causes a peculiar trend of the muon polarization. This phenomenon has never been observed for materials with nuclei having large spin. Very recently

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24

Karthik, G. "Investigations Of Spin-Dynamics And Steady-States Under Coherent And Relaxation Processes In Nuclear Magnetic Resonance Spectroscopy." Thesis, Indian Institute of Science, 2001. https://etd.iisc.ac.in/handle/2005/259.

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The existence of bulk magnetism in matter can be attributed to the magnetic properties of the sub-atomic particles that constitute the former. The fact that the origin of these microscopic magnetic moments cannot be related to the existence of microscopic currents became apparent when this assumption predicted completely featureless bulk magnetic properties in contradiction to the observation of various bulk magnetic properties [1]. This microscopic magnetic moment, independent of other motions, hints at the existence of a hitherto unknown degree of freedom that a particle can possess. This pr

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25

Karthik, G. "Investigations Of Spin-Dynamics And Steady-States Under Coherent And Relaxation Processes In Nuclear Magnetic Resonance Spectroscopy." Thesis, Indian Institute of Science, 2001. http://hdl.handle.net/2005/259.

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The existence of bulk magnetism in matter can be attributed to the magnetic properties of the sub-atomic particles that constitute the former. The fact that the origin of these microscopic magnetic moments cannot be related to the existence of microscopic currents became apparent when this assumption predicted completely featureless bulk magnetic properties in contradiction to the observation of various bulk magnetic properties [1]. This microscopic magnetic moment, independent of other motions, hints at the existence of a hitherto unknown degree of freedom that a particle can possess. This pr

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26

Gulener, Fatih. "Etude expérimentale et théorique de la relaxation des moments magnétiques dans un verre de spin Ising." Phd thesis, Université Paris Sud - Paris XI, 2001. http://tel.archives-ouvertes.fr/tel-00001917.

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Nous étudions principalement les propriétés dynamiques dans le verre de spin quasi-Ising métallique FexTiS2 où les atomes de fer sont insérés par intercalation dans une structure en feuillets. Des mesures d'aimantation statique au SQUID et de caractérisation structurale par diffraction de rayons X (diagramme de poudre, affinement Rietveld) sont présentées afin de comprendre le diagramme de phase. Nous étudions la forme de la relaxation de spin en fonction de la température et de la concentration d'impuretés x. L'intérêt de travailler avec ce type de matériau très anisotrope est de se placer da

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27

Clark, Lucy. "Synthesis and study of frustrated oxide and mixed anion materials." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8073.

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Mixed anion systems, such as oxynitrides and oxyfluorides, are an emerging class of interesting materials. The lower stability of mixed anion systems in comparison to oxide materials has had the consequence that this area of materials research is relatively less well explored. However, the development of new synthesis techniques has resulted in the preparation of many new mixed anion systems and so a detailed understanding of their structure and how this relates to their electronic and magnetic properties is necessary. Within this Thesis, several oxide, oxynitride and oxyfluoride systems are i

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28

Harvey, Pierre Dominique. "Applications of vibrational spectroscopy and NMR spin-lattice relaxation time measurements to organometallic and organic molecular crystals." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=73986.

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29

Beck, Michael [Verfasser]. "Optical spectroscopy of donor bound excitons and spin relaxation of donor electrons in isotopically enriched silicon / Michael Beck." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2019. http://d-nb.info/1194158439/34.

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30

Adur, Rohan. "Magnetic Coupling and Relaxation at Interfaces Measured by Ferromagnetic Resonance Spectroscopy and Force Microscopy." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406120604.

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31

Nordstierna, Lars. "Molecular Association Studied by NMR Spectroscopy." Doctoral thesis, Stockholm : Physical Chemistry, Department of Chemistry, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3947.

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32

Ou, Yu-Sheng. "Ultrafast Study of Dynamic Exchange Coupling in Ferromagnet/Oxide/Semiconductor Heterostructures." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1490361750624291.

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33

Shermadini, Zurab [Verfasser], Hans-Henning [Akademischer Betreuer] Klauß, and Clemens [Akademischer Betreuer] Laubschat. "Iron based pnictide and chalcogenide superconductors studied by muon spin spectroscopy / Zurab Shermadini. Gutachter: Hans-Henning Klauß ; Clemens Laubschat. Betreuer: Hans-Henning Klauß." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://d-nb.info/1068447737/34.

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34

Young, Matthew Alexander. "A site-directed spin labelling study of the human alpha-lactalbumin molten globule." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:cdc9904d-77cc-4d20-b01d-096bc2b16d72.

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The human α-lactalbumin (α-LA) molten globule formed at low pH is a model for the study of protein folding intermediates. The molten globule lacks native-like side-chain interactions, resulting in a fluctuating ensemble of tertiary structures, characterisation of which has been precluded by severe line-broadening in NMR spectra and a lack of long-range NOEs. Paramagnetic relaxation enhancements (PREs) have been measured in a variant of α-LA in which all native cysteines have been mutated to alanine (all-Ala α-LA). Cysteine residues have been mutated into regions of inte

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35

Ikeda, Atsutoshi. "Unconventional properties of the antiperovskite oxide superconductor Sr₃-xSnO and a related compound." Kyoto University, 2020. http://hdl.handle.net/2433/253070.

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36

Bhowmick, Mithun. "Time Resolved Spectroscopy in InAs and InSb based Narrow-Gap Semiconductors." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/77136.

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As the switching rates in electronic and optoelectronic devices are pushed to even higher frequencies, it is crucial to probe carrier dynamics in semiconductors on femtosecond timescales. Time resolved spectroscopy is an excellent tool to probe the relaxation dynamics of photoexcited carriers; where after the initial photoexcitation, the nonequilibrium population of electrons and holes relax by a series of scattering processes including carrier-carrier and carrier-phonon scattering. Probing carrier and spin relaxation dynamics in InAs and InSb based narrow-gap semiconductors is crucial to unde

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37

Jackson, Richard Simon. "Structural studies of PVC gels by Raman spectroscopy." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.344026.

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38

James, Christopher Dominic. "PARAMAGNETIC RESONANCE STUDIES OF HIGH-SPIN COBALT (II) COORDINATION COMPLEXES." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami152267342524459.

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39

Lovett, Brendon. "Three molecular materials studied by positive muons and magnetometry." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365360.

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40

Szilagyi, Petra Agota. "Study of iron-chelates in solid state and aqueous solutions using Mössbauer spectroscopy." Toulouse 3, 2007. http://thesesups.ups-tlse.fr/142/.

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Ce travail a été consacré à l'étude du complexe éthylènediamine tétra-acétate de fer(III) (FeIIIEDTA) et de ses analogues : cyclohexanediamine tétra-acétate de fer(III) (FeIIICDTA) et (N,N')éthylènediamine di-acétate de fer(III) (FeIIIEDDA). Les structures de ces complexes en solutions aqueuses aux pH différents ont été proposées. La photodégradation du FeIIIEDTA ainsi que l'auto-oxydation du système Fe2+/EDTA dans les états solide et en solution ont été étudiées. Les mécanismes des réactions entre les complexes de FeIIIEDTA/CDTA/EDDA et l'H2O2 ainsi que la structure des intermédiaires issus d

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41

Xie, Mouzhe. "Probing and Modeling Biomolecule-Nanoparticle Interactions by Solution Nuclear Magnetic Resonance Spectroscopy." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532049249287026.

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42

Ubben, Kai Ubbo. "Untersuchung der Spinrelaxation in GaN anhand spin- und zeitaufgelöster differentieller Reflektanzspektroskopie." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17134.

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Im Rahmen dieser Arbeit werden Untersuchungen der Spinrelaxation in epitaktischen GaN-Schichten mit unterschiedlichen Donatorkonzentrationen und Versetzungsdichten mit Hilfe spin- und zeitaufgelöster differentieller Reflektanzspektroskopie präsentiert. Dabei wurden die optischen Anregungsbedingungen sehr sorgfältig gewählt. Neben der genauen Abstimmung der Anregungsenergie, unterstützt durch die Modellierung der differentiellen Reflektanz, wurden insbesondere spektral schmale Laserpulse verwendet. Diese erlauben eine selektive Anregung der untersuchten Übergänge. Es wurden Spinlebensdauern von

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43

Lam, James. "Hydrogen diffusion in concentrated metal hydrides." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301906.

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44

Stelzl, Lukas Sebastian. "Studying marcomolecular transitions by NMR and computer simulations." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:6e4bbe06-fc58-471b-a932-d940fe78b9a5.

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Macromolecular transitions such as conformational changes and protein-protein association underlie many biological processes. Conformational changes in the N-terminal domain of the transmembrane protein DsbD (nDsbD) were studied by NMR and molecular dynamics (MD) simulations. nDsbD supplies reductant to biosynthetic pathways in the oxidising periplasm of Gram-negative bacteria after receiving reductant from the C-terminal domain of DsbD (cDsbD). Reductant transfer in the DsbD pathway happens via protein-protein association and subsequent thiol-disulphide exchange reactions. The cap loop shield

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45

Lloyd, Sion. "The magnetic properties of superconductors." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343847.

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46

Brown, Richard Matthew. "Coherent transfer between electron and nuclear spin qubits and their decoherence properties." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:21e043b7-3b72-44d7-8095-74308a6827dd.

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Conventional computing faces a huge technical challenge as traditional transistors will soon reach their size limitations. This will halt progress in reaching faster processing speeds and to overcome this problem, require an entirely new approach. Quantum computing (QC) is a natural solution oﬀering a route to miniaturisation by, for example, storing information in electron or nuclear spin states, whilst harnessing the power of quantum physics to perform certain calculations exponentially faster than its classical counterpart. However, QCs face many diﬃculties, such as, protecting the quantum-

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47

Iordanov, Iordan. "Structure and dynamics of the outer membrane protein A from Klebsiella pneumoniae : a joint NMR–SMFS–proteolysis and MS approach." Toulouse 3, 2012. http://thesesups.ups-tlse.fr/1602/.

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"KpOmpA est une protéine de la membrane externe de K. Pneumoniae. Elle fait partie de la famille des "outer membrane protein A", OmpA. KpOmpA est une protéine constituée de deux domaines: un domaine transmembranaire structuré en tonneau ß et une partie soluble, périplasmique. Le domaine transmembranaire de KpOmpA présente une homologie importante avec celle d'OmpA d'E. Coli dont la structure a été déterminée par cristallographie aux rayons X et spectroscopie RMN. OmpA d'E. Coli est responsable lors de la formation de biofilm. Elle a un rôle d'adhésine et d'invasine. Elle est la cible préférent

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48

Silva, Marcos Antonio da. "Estudo de compostos LiMePO4 (Me=Mg, Co, Ni) através de Ressonância Magnética Nuclear." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-13032014-112117/.

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Nesta dissertação é apresentado um estudo dos compostos Li1-3xMgFexPO4 através de Ressonância Magnética Nuclear (7Li e 31P), no intervalo de temperatura de 150 a 410 K. Estudos desses compostos através de técnicas de difração de elétrons e efeito Mossbauer confirmam que os íons Fe entram na rede cristalina na forma Fe3+, substituindo os íons Li+. O comportamento dos espectros de RMN, dos tempos de relaxação spin-rede e da susceptibilidade magnética dos núcleos 7Li e 31P em função da temperatura, em conjunto com medidas de condutividade iônica, indicam que, mesmo com a adição de impurezas Fe3+

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49

Tesi, Lorenzo. "Multitechnique investigation for rational design of molecular spin qubits." Doctoral thesis, 2019. http://hdl.handle.net/2158/1150777.

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The investigation of the relaxation times of a series of vanadium(IV)-based molecular spin qubits in order to find a correlation to their structural properties. The magnetic system and the lattice structure have been studied by using a multitechnique investigation based on EPR, ac susceptometry, THz spectroscopy and 4D-Inelastic Neutron Scattering. New techniques have been proposed, such as Muon Spin Relaxation spectroscopy, and first preliminary results have been achieved by investigating Dy-based SMMs. A small part of the work is devoted to the characterization of a cobalt(II)-based SMM and

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50

Kamusella, Sirko. "Electronic phase diagrams and competing ground states of complex iron pnictides and chalcogenides: A Mössbauer spectroscopy and muon spin rotation/relaxation study." Doctoral thesis, 2016. https://tud.qucosa.de/id/qucosa%3A30237.

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In this thesis the superconducting and magnetic phases of LiOH(Fe,Co)(Se,S), CuFeAs/CuFeSb, and LaFeP_1-xAs_xO - belonging to the 11, 111 and 1111 structural classes of iron-based arsenides and chalcogenides - are investigated by means of 57Fe Mössbauer spectroscopy and muon spin rotation/relaxation (μSR). Of major importance in this study is the application of high magnetic fields in Mössbauer spectroscopy to distinguish and characterize ferro- (FM) and antiferromagnetic (AFM) order. A user-friendly Mössbauer data analysis program was developed to provide suitable model functions not only for

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