Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Magnetic Frustration"”.
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Frustrated Magnetism in Strongly Correlated Electron Systems
… of magnetism is essential for its application in magnetic semiconductors, spintronic devices and unconventional superconductors. In this work, we study magnetic structures and their corresponding excitations in several strongly correlated electron systems, where exotic orderings can be induced as …
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Ferromagnetism and transport in diluted magnetic semiconductors
… focuses on the study of ferromagnetism in Dilute Magnetic Semiconductors. To study these strongly correlated electronic systems, two non- perturbative techniques are used: the Dynamical Mean Field Approximation (DMFA) and the Dynamical Cluster Approximation (DCA). The model used for Dilute …
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Synthesis and characterization of single crystal kagomé lattice antiferromagnets
… material. This system is characterized by strong magnetic frustration and is a likely candidate for a spin-liquid ground state. The spin-liquid state was originally proposed to exist in the parent compounds of the high temperature superconducting cuprates as originally proposed by Anderson. …
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Synergistic Properties-Driven Synthesis of Aluminides, Antiomonides, and Bioceramics
… elucidation and accurate measurements of their magnetic and electrical properties. The relationship between the complex crystal structures and magnetic properties are reported for LnCo2Al8 (Ln = La-Nd, Sm, Yb), CeCo2-xMnxAl8 (0 < x < 1), and Pr2Fe4-xCoxSb5 (1 ≤ x < 3). The discovery of magnetic …
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Interfacial Magnetism and Exchange Bias in Metal Oxide Thin Films
This thesis focuses on the investigations of magnetic thin film structure of cubic and perovskite transition metal oxide magnets, particularly when two different magnetic orderings are competing at such interface. The goal is to understand the various effects of an interfaces that exert on the …
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Investigation of Frustrated Quasi-One-Dimensional Quantum Spin-Chain Materials
… harbor Cu2+ spin-chains. These compounds are magnetically frustrated with competing nearest-neighbour and next-nearest-neighbour intrachain spin-exchange interactions. Despite the similarities between CuAs2O4 and CuSb2O4, they exhibit very different magnetic properties. In this thesis work, …
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The Chemistry and Crystallography of Doped Bixbyite, Braunite and Novel Anion-Deficient Fluorite Oxides
… received the most attention recently for its magnetic properties. A review of the literature reveals multiple different magnetic structures being cited, studies with samples of varying quality and often limited sample characterisation. Flux free vapour aided abnormal grain growth (AGG) methods …
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Imaging magnetic order in magneto-structural phases of Mn3O4
Frustration in A-site spinels due to the competition between complex structure and strong interactions has been the focus of many theoretical and experimental studies recently. Mn3O4 is one such material with a three way interplay between complex lattice geometry, strong spin-lattice coupling and …
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Proximity effects and vortex dynamics in mesoscopic superconductor-normal metal-superconductor arrays
… in response to an externally applied current and magnetic field. We provide evidence that the superconducting state is characterized by bound vortex-antivortex pairs. Additionally, we study the current-voltage characteristics; applying a current induces a Lorentz force on vortices that competes …