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Multipolar Dynamics and Effect of Disorder in the Rare-Earth Vanadates
Multipolar Dynamics and Effect of Disorder in the Rare-Earth Vanadates
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103135
- ISBN
- 9798311951838
- DDC
- 540
- 저자명
- Li, Yuntian.
- 서명/저자
- Multipolar Dynamics and Effect of Disorder in the Rare-Earth Vanadates
- 발행사항
- [Sl] : Stanford University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 132 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Fisher, Ian.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2025.
- 초록/해제
- 요약The ferroquadrupole order of local 4f atomic orbitals in the magnetic insulator TmVO4 provides a local-moment realization of the nematic order for which the underlying Hamiltonian is well-established. This model material system enables us to explore several important open questions about the equilibrium properties and dynamics of nematic materials which have important implications beyond just this specific case. This thesis document presents a quantitative experimental study of TmVO4and the closely related magnetic analog YbVO4, including exploring slow dynamics at low temperatures and the effects of disorder induced by chemical substitutions. The following chapters record measurement principles and new experimental methods that focus on probing magnetization and temperature response to AC fields as a means to investigate complex magnetization dynamics, as well as higher-order multipole dynamics.From an experimental technique perspective, Chapters 2 and 3 introduce a new device setup of the AC magnetocaloric effect, which is complementary to AC susceptibility measurements. The combination of the two chapters describes a framework to understand the magneto-thermal response within these materials for both types of measurement. First, a new set of instrument development is established based on the measurement of GdVO4, for which crystal field effects are nominally absent, providing a more straightforward case for which a thermal transport process explains the observation of magneto-thermal relaxation. A detailed experimental tutorial included in the two chapters gives researchers an opportunity to efficiently understand and establish similar measurements in standard material research facilities, which have access to analog electronics, magnetic fields, and low-temperature equipment.The measurements and analysis in Chapter 5 reveal that the dissipation is characterized by a single intrinsic time constant for the magnetic case (YbVO4). In contrast, the quadrupolar material (TmVO4) in Chapter 6 exhibits a range of relaxation times, indicative of glassy behavior, that is tentatively ascribed to the quadrupolar degrees of freedom.
- 일반주제명
- Crystal structure
- 일반주제명
- Study abroad
- 일반주제명
- Spheres
- 일반주제명
- Racial profiling
- 일반주제명
- Magnetic fields
- 일반주제명
- Normal distribution
- 일반주제명
- Symmetry
- 일반주제명
- Phase transitions
- 일반주제명
- Heat conductivity
- 일반주제명
- Materials science
- 일반주제명
- Atomic physics
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103135
■006m o d
■007cr#unu||||||||
■020 ▼a9798311951838
■035 ▼a(MiAaPQ)AAI31974601
■035 ▼a(MiAaPQ)Stanfordfd189vg5633
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a540
■1001 ▼aLi, Yuntian.
■24510▼aMultipolar Dynamics and Effect of Disorder in the Rare-Earth Vanadates
■260 ▼a[Sl]▼bStanford University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a132 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Fisher, Ian.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2025.
■520 ▼aThe ferroquadrupole order of local 4f atomic orbitals in the magnetic insulator TmVO4 provides a local-moment realization of the nematic order for which the underlying Hamiltonian is well-established. This model material system enables us to explore several important open questions about the equilibrium properties and dynamics of nematic materials which have important implications beyond just this specific case. This thesis document presents a quantitative experimental study of TmVO4and the closely related magnetic analog YbVO4, including exploring slow dynamics at low temperatures and the effects of disorder induced by chemical substitutions. The following chapters record measurement principles and new experimental methods that focus on probing magnetization and temperature response to AC fields as a means to investigate complex magnetization dynamics, as well as higher-order multipole dynamics.From an experimental technique perspective, Chapters 2 and 3 introduce a new device setup of the AC magnetocaloric effect, which is complementary to AC susceptibility measurements. The combination of the two chapters describes a framework to understand the magneto-thermal response within these materials for both types of measurement. First, a new set of instrument development is established based on the measurement of GdVO4, for which crystal field effects are nominally absent, providing a more straightforward case for which a thermal transport process explains the observation of magneto-thermal relaxation. A detailed experimental tutorial included in the two chapters gives researchers an opportunity to efficiently understand and establish similar measurements in standard material research facilities, which have access to analog electronics, magnetic fields, and low-temperature equipment.The measurements and analysis in Chapter 5 reveal that the dissipation is characterized by a single intrinsic time constant for the magnetic case (YbVO4). In contrast, the quadrupolar material (TmVO4) in Chapter 6 exhibits a range of relaxation times, indicative of glassy behavior, that is tentatively ascribed to the quadrupolar degrees of freedom.
■590 ▼aSchool code: 0212.
■650 4▼aCrystal structure
■650 4▼aStudy abroad
■650 4▼aSpheres
■650 4▼aRacial profiling
■650 4▼aMagnetic fields
■650 4▼aNormal distribution
■650 4▼aSymmetry
■650 4▼aPhase transitions
■650 4▼aHeat conductivity
■650 4▼aMaterials science
■650 4▼aAtomic physics
■690 ▼a0794
■690 ▼a0748
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357126▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


