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Dissertations / Theses on the topic 'Electric field induced phase transition'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Koussir, Houda. "Multiscale study of the electric field induced transition in the Mott phase of GaMo4S8 crystals and TaSe2 monolayers." Electronic Thesis or Diss., Université de Lille (2022-....), 2024. http://www.theses.fr/2024ULILN004.

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Dans le domaine de la physique de la matière condensée, les isolants de Mott sont essentiels pour explorer des phénomènes électroniques complexes, ayant des implications significatives pour la supraconductivité à haute température et les liquides de spin quantiques. Cette thèse porte sur deux types d'isolants de Mott qui se distinguent l'un de l'autre par leur dimensionalité : des cristaux de GaMo4S8 et des monocouches de 1T-TaSe2.Après avoir introduit leurs propriétés dans le premier chapitre, le second chapitre traite des techniques utilisées pour caractériser ces matériaux à l'échelle local

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2

Peräntie, J. (Jani). "Electric-field-induced dielectric and caloric effects in relaxor ferroelectrics." Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526204406.

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Abstract In this thesis, dielectric and thermal behaviours due to the application of an electric field were studied in relaxor ferroelectric (1−x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) and (1−x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-PT) systems of great technological importance. Special attention was given to the behaviour of the electric-field-induced phase transitions and electrocaloric effect, which are closely related to the existing and potential applications. Reactive sintering or columbite methods were used to fabricate polycrystalline PMN-PT ceramics with various compositions (x=0−0.3). In addition,

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3

Cheng, Long. "Relaxor ferroelectrics for neuromorphic computing." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST073.

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Pour surmonter les défis posés par les architectures traditionnelles de von Neumann, l'informatique neuromorphique s'inspire des sciences du cerveau pour créer du matérielécoénergétique adaptable à des tâches complexes. Les memristors, bien que novateurs,rencontrent des problèmes tels que la chaleur de Joule entravant le calcul neuronal à trèsbasse puissance.Pour remédier à cela, nous proposons un mécanisme de memcapacitor -la transition de phase induite par champ électrique. Les memcapacitors, qui expriment les signaux en tension, offrent une consommation d'énergie inférieure aux memristors (

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4

Johnson, Louise. "Electric field-induced transitions and interlayer interactions in intermediate smectic liquid crystal phases." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/electric-fieldinduced-transitions-and-interlayer-interactions-in-intermediate-smectic-liquid-crystal-phases(64a81e3e-d148-48b4-8e94-4abd44117655).html.

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This thesis presents an investigation into the effects of an external electric field on the three- and four-layer intermediate smectic phases. Experiments were performed using electro-optic techniques; thresholds between phases were measured by studying changes in the effective optical tilt. A quantitative measure of the interlayer interaction constant was obtained from the analysis of field-temperature phase diagrams in several materials, which exhibited the intermediate smectic phases in various degrees of stability. Excellent agreement with theory was observed in the field-temperature phase

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5

Royles, Adam John. "Electric-field-induced phase transformations in lead-free piezoelectric ceramics." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578687.

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Solid-solutions of perovskite sodium bismuth titan ate modified with potassium bismuth titanate can be fabricated by a conventional mixed oxide processing route to produce a range of highly dense polycrystalline ceramics for the 0.1 < x < 0.3 xNa0.5Bi0.5TiO3-1-xK05Bi0.5TiO3 series. Sintered ceramics are shown to be single phase rhombohedral in the compositional range 0.1 <x <0.25 and single phase tetragonal in the range 0.26< x < 0.3. By employing novel, in-situ synchrotron diffraction techniques, it is possible to show an excursion across a morphotropic phase boundary which gives rise to an i

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6

Pilla, S. "Electric-field induced glass phase in molecular solids at low temperatures." [Gainesville, Fla.] : University of Florida, 1999. http://etd.fcla.edu/etd/uf/1999/amp7406/pilla.pdf.

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Thesis (Ph. D.)--University of Florida, 1999.<br>Title from first page of PDF file. Document formatted into pages; contains xi, 95 p.; also contains graphics (some colored). Vita. Includes bibliographical references (p. 90-94).

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7

An, Ran. "Study of the field-induced phase transition for the antiferromagnetic chain /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MATH%202006%20AN.

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8

Gustainis, Peter. "Field induced phase transition in one dimensional Heisenberg antiferromagnet model studied using density matrix renormalization group." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61214.

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This thesis examines the Heisenberg antiferromagnetic spin chain in one dimension (1D) with a crystal field splitting term and applied magnetic field term. We use theoretical techniques from quantum field theory and conformal field theory (CFT) to make predictions about the excitation spectrum for our model. We then use Density Matrix Renormalization Group (DMRG) numerical techniques to simulate our spin chain and extract the energy spectrum as we vary our crystal field splitting and magnetic field terms. These results are compared and we examine where theoretical calculations accurately descr

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9

Leist, Jeannis-Nicos, Jakob Sidoruk, Holger Gibhardt, Klaudia Hradil, Martin Meven, and Götz Eckold. "Domain redistribution and ferroelectric phase transition in SrTiO 3 under the influence of an electric field and mechanical stress." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-187976.

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10

Leist, Jeannis-Nicos, Jakob Sidoruk, Holger Gibhardt, Klaudia Hradil, Martin Meven, and Götz Eckold. "Domain redistribution and ferroelectric phase transition in SrTiO 3 under the influence of an electric field and mechanical stress." Diffusion fundamentals 12 (2010) 69, 2010. https://ul.qucosa.de/id/qucosa%3A13899.

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11

Rambo, Matthew P. "Study of ZrSiO4 phase transition using perturbed angular correlation spectroscopy." Connect to this document online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1109871239.

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Thesis (M.S.)--Miami University, Dept. of Physics, 2005.<br>Title from first page of PDF document. Document formatted into pages; contains [1], vii, 55 p. : ill. Includes bibliographical references (p. 53-55).

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12

Rambo, Matthew P. "Study of ZrSiO₄ Phase Transition Using Perturbed Angular Correlation Spectroscopy." Miami University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=miami1109871239.

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13

Jose, Davis. "Dynamics of the B-A transition of DNA double helices." Doctoral thesis, [S.l.] : [s.n.], 2005. http://webdoc.sub.gwdg.de/diss/2005/jose/jose.pdf.

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14

Khanal, Kiran. "Liquid-Crystalline Ordering in Semiflexible Polymer Melts and Blends: A Monte Carlo Simulation Study." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1373901748.

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15

Barbut, Jean-Marc. "Texturation d'YBa2Cu3O(7-[delta]) par fusion de zone sous champ magnétique : détermination par mesure de courant critique de son diagramme de phase dans le plan [H,[THETA]] à 77 K : mise en évidence par mesures résistives de l'existence en champ nul d'une transition du 1er ordre dans l'état supraconducteur." Grenoble 1, 1994. http://www.theses.fr/1994GRE10049.

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Les applications en courant fort de la ceramique supraconductrice a haute temperature critique yba#2cu#3o#7## necessitent l'amelioration des qualites supraconductrices et l'augmentation de la taille des materiaux synthetises. Un nouveau procede de synthese, combinant la fusion de zone et l'action du champ magnetique, permet de produire des conducteurs de grande longueur massivement orientes. Cette methode autorise la synthese de barreaux d'yba#2cu#3o#7## de plusieurs centimetres de long, composes d'un petit nombre de grains avec une faible desorientation des plans a,b, la direction de l'axe c

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16

Morosan, Emilia. "Field-induced magnetic phase transitions and correlated electronic states in the hexagonal RAgGe and RPtIn series /." 2005.

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17

HSU-WEN-TING and 許文廷. "Phase Transition and Electric-field Poling Effect in Pb(Mg1/3Nb2/3)1-xTixO3." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/56986355845184987551.

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碩士<br>輔仁大學<br>物理學系<br>93<br>This work was measured electric permittivity and observed polarizing microscope after applied different electric field on (111)-cut single crystal Pb(Mg1/3Nb2/3)1-xTixO3 , for x= 28.6, 34.4, and 35.8. In these samples, an electric field applied along the [111] direction. As electric field applied, more polarization of sample domains was rotated into monoclinic phase, and this phase plays an important role in phase transition while temperature increases. Electric field enhanced some phase transition or induced phase appear with monoclinic phase increase. By measured

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18

SHEN, YU-REN, and 沈毓仁. "Optically induced phase grating in an electric-field biased planar aligned liquid-crystal films." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/27953695765786987720.

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19

Chiou, Shih-Wei, and 邱仕偉. "Field-induced shape memory effect and pseudoelastic phenomenon associated with phase transition behavior in lead zirconate titanate stannate system." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/04386025736528868763.

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20

Lee, Chi-Fen, and 李季芬. "The Study of Electric Field and Surface Electro-clinic Effect on the Alignment of the Ferroelectric Liquid Crystal Cell with N*-SmC* Phase Transition." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/438gbm.

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碩士<br>國立臺北科技大學<br>光電工程系研究所<br>95<br>In the ferroelectric liquid crystal(FLC) material with N*-SmC* phase sequence, two types of domain with opposite polarization direction randomly formed in the SmC* phase. The director of the molecules in each domain deviate a fixed angle in opposite side from the rubbing direction due to the surface electroclinic effect. Therefore, horizontal chevron defects form and then, the alignment in this kind of material is not uniform. In this paper, we investigated the relationship between the alignment and the deviation angle in the ferroelectric liquid crystal cel

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21

Tabei, Seyed Mohiaddeen Ali. "Interplay of Disorder and Transverse-Field Induced Quantum Fluctuations in the LiHo_xY_{1-x}F_4 Ising Magnetic Material." Thesis, 2008. http://hdl.handle.net/10012/3888.

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The LiHo_xY_{1-x}F_4 magnetic material in a transverse magnetic field B_x perpendicular to the Ising spin direction has long been used to study tunable quantum phase transitions in pure and random disordered systems. We first present analytical and numerical evidences for the validity of an effective spin-1/2 approach to the description of a general dipolar spin glass model with strong uniaxial Ising anisotropy and subject to weak B_x. We relate this toy model to the LiHo_xY_{1-x}F_4 transverse field Ising material. We show that an effective spin-1/2 model is able to capture both the

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22

Prévost, Bobby. "Étude des propriétés magnétiques des aimants frustrés Ba(Dy,Ho)2O4 et SrHo2O4 par diffusion de neutrons." Thèse, 2018. http://hdl.handle.net/1866/21151.

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