Thesis (M.Sc.)--Memorial University of Newfoundland, 2002. / Bibliography: leaves 106-110.

Thesis (M.S.)--University of Wisconsin--Madison, 1969. / Vol. 2 mainly program printouts. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Dissertation (Ph.D.)--Auburn University, / Abstract. Vita. Includes bibliographic references (p.150-157).

Dissertation (D.M.A.)--The University of North Carolina at Greensboro, 2009. / Directed by Welborn Young; submitted to the School of Music. Title from PDF t.p. (viewed May 11, 2010). Includes bibliographical references (p. 137-143).

Thesis (Ph.D.) - University of Queensland, 2005. / Includes bibliography.

Thesis (M.M.)--Bowling Green State University, 2007. / Document formatted into pages; contains x, 107 p. Includes bibliographical references.

Thesis (Ph. D.)--University of Chicago, Dept. of Physics, March 2001. / Includes bibliographical references. Also available on the Internet.

Submitted by Lucas Cesar Gomes Squillante null (lucasquillante@hotmail.com) on 2018-01-19T17:39:44Z No. of bitstreams: 1 Dissertação de Mestrado Lucas Cesar Gomes Squillante.pdf: 13112928 bytes, checksum: b4a4e7a0bc1cbdc48db3b829714e912d (MD5) / Approved for entry into archive by Ana Paula Santulo Custódio de Medeiros null (asantulo@rc.unesp.br) on 2018-01-22T13:15:43Z (GMT) No. of bitstreams: 1 squillante_lcg_me_rcla.pdf: 13113103 bytes, checksum: ee63e961b931fa78df69438fc268b5f2 (MD5) / Made available in DSpace on 2018-01-22T13:15:43Z (GMT). No. of bitstreams: 1 squillante_lcg_me_rcla.pdf: 13113103 bytes, checksum: ee63e961b931fa78df69438fc268b5f2 (MD5) Previous issue date: 2017-11-24 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O fenômeno da supercondutividade atualmente um dos mais relevantes tópicos na Física da Matéria Condensada, tornando os sistemas fortemente correlacionados um tópico de grande interesse devido à possibilidade de estudar os aspectos fundamentas da interação elétron-elétron, que são o âmago da supercondutividade. Desta forma, a classe de condutores moleculares (TMTTF)2X (onde TMTTF é tetrametiltetratiafuvaleno e X é um contra-ânion) desempenha um papel sistemático e fundamental no estudo de tais aspectos de correlação. Nesta tese de mestrado, os materiais de interesse foram o (TMTTF)2PF6-H12 e o (TMTTF)2PF6-D12, onde uma anomalia na constante dielétrica diferente para os dois sais foi observada na transição ferroelétrica de Mott-Hubbard através de medidas de constante dielétrica quasi-estática no eixo c* (contribuição iônica) e o comportamento tipo relaxor da variante hidrogenada foi analisado com base na teoria de campo médio. Uma revisão de transições de fase clássicas e quânticas também foi realizada com o objetivo de estudar o chamado efeito magneto-calórico para o modelo do paramagneto de Brillouin (o parâmetro de Grüneisen magnético), que é uma grandeza Física única e poderosa para detectar experimentalmente uma transição de fase quântica induzida por campo magnético em um sistema real. Ainda, um estudo comparativo entre as fases delta (hexagonal) e delta' (tetragonal) da liga binária FeSe1-x foi realizado e monocristais foram sintetizados utilizando o método de síntese de estado sólido visando atingir a fase delta. / The phenomenon of superconductivity is currently one of the most relevant topics in Solid State Physics, making strongly correlated systems a very highattractive topic due to the possibility of studying the fundamental aspects of the electron-electron interaction that are the core of superconductivity. Thus, the class of molecular conductors (TMTTF)2X (where TMTTF is tetramethyltetrathiafuvalene and X is a counter-anion) plays a systematic and fundamental role to study such correlation aspects. In this Master Thesis, the materials of interest were the (TMTTF)2PF6-H12 and (TMTTF)2PF6-D12, where a different dielectric anomaly at the Mott-Hubbard ferroelectric transition was observed for the two salts and the relaxor behavior of the hydrogenated variant was analysed based on the mean-field theory. A review of classical and quantum phase transitions was performed aiming to study the so-called magneto-caloric effect (the magnetic Grüneisen parameter) for the Brillouin paramagnet model, which is a powerful and unique physical quantity to experimentally detect a quantum phase transition induced by magnetic field in a real system. Also, a comparative study between the (hexagonal) and (tetragonal) phases of the binary alloy FeSe1-x was performed and single-crystals were synthesized employing the solid-state reaction method in order to achieve the phase.

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