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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 20 of 45 for “"magnetic interactions"”.
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Investigation of magnetic interactions in topological insulators
… This thesis is a comprehensive study of magnetic interactions in topological insulators, from both experimental and theoretical perspective. Generically, there are two approaches to bring TI magnetic, the proximity effect and the conventional transitional metal ion doping. In the …
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Theory of lattice effects on magnetic interactions in solids
… the effect of lattice distortions on the magnetic properties of nickelates and manganites. These two families of materials have great potential in industrial applications in the fields of magnetic (superdense hard-drives, fast memory) and charge storage (batteries). The introduction and …
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Physics and applications of magnetic interactions in topological insulators
… (TIs), paying particular attention to how magnetic interactions can alter their high-frequency response. To model AC transport within these materials, we develop a novel simulation framework that self-consistently solves frequency-domain quantum transport equations with the full solution of …
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Magnetic interactions between Co₅Sm and iron cobalt fine particle composites
Thesis (M.S.)--Michigan State University. Dept. of Metallurgy, Mechanics, and Materials Science, 1971
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High Pressure Moessbauer Studies of Magnetic Interactions in Palladium - Cobalt Alloys
Made available in DSpace on 2015-05-12T21:41:50Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6910662.PDF: 4070329 bytes, checksum: 148b3ab55f169fdd536f41f12293eb8a (MD5) Previous issue date: 1968
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High pressure Mössbauer studies of magnetic interactions in palladium-cobalt alloys
The pressure dependence of the Fe57 hyper fine field has been studied by means of the Mossbauer effect in a series of PdCo alloys consisting of 5, 8, 9, 12, and 15 atomic percent Co, up to 180 kilobarsat 297 oK. The Curie temperatures (Tc) of the 8% and 9% alloys are observed to increase with …
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New models of magnetic interactions for bound magnetic polarons in dilute magnetic semiconductors
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1990
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The Magnetic Exchange Interactions in Chromium Chalcogenide Spinels
… the octahedral (B) sites, so that when diamagnetic ions are located at the tetrahedral (A) sites the only magnetic interactions present are those between B-site ions. Despite such apparently simple circumstances a rich variety of magnetic behaviour is exhibited. For the oxides the ground …
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Characterization of Magnetic Nanostructured Materials by First Order Reversal Curve Method
<p>The Interactions and magnetization reversal of Ni nanowire arrays and synthetic anit-ferromagnetic coupled thin film trilayers have been investigated through first order reversal curve (FORC) method. By using a quantitative analysis of the local interaction field profile distributions obtained …
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Chemical Spin Patterning in Metal-Organic Frameworks
… generating new collective behaviors. In magnets, interactions between electron spins result in emergent properties with profound fundamental and technological implications. As metal-organic-frameworks (MOFs) are highly tailorable materials, this thesis will examine the utilization of MOF platforms …
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Microstructural Analysis of Garnet-Heavy Metal Heterostructures
… earth iron garnets (REIGs) are a class of ferrimagnetic insulators desirable for their tunable magnetic properties. Saturation magnetization, perpendicular magnetic anisotropy (PMA), coercivity, and Gilbert damping are just a few characteristics that can be altered via elemental substitution or …
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Experiments to investigate phonon-nuclear interactions
… excitation transfer mechanism. Electric and magnetic interactions of phonons with atomic nuclei have been studied for several decades. However, such second-order interactions are too weak to induce nuclear state changes. Hagelstein and Chaudhary recently identified the possibility of a …
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Quantum Mediated Effective Interactions For Spatially Complex Systems
Magnetic interactions between classical or quantum spin degrees of freedom in a condensed matter system are mediated by particles, which come in two flavors, fermions or bosons. Such a magnetic system can be put on a discrete lattice and one can ask about the nature of the ground state resulting …
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Intelligence Through Interaction: Leveraging Physical Interactions In Simple Robots To Produce Complex Behaviors
… robot behavior can emerge from physical interactions rather than sensing, computation, and actuation in the traditional sense. Two robotic systems are presented to explore this concept in different domains. The first is a swarm of simple rolling robots whose collective morphology is …
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Investigating and Enhancing Spin Reversal Barriers in Dinuclear 4f Single-Molecule Magnets and the Ultimate Shift to Mononuclear 3d Complexes
In order for molecular magnetic materials to become applicable, they must retain their magnetisation at reasonable temperatures, which can be achieved with high energy barriers for spin reversal and high blocking temperatures. In the field of Single-Molecule Magnets (SMMs), over the last decade, …
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Exchange bias in patterned nanostructures
… in commonly used electronic components such as magnetic recording heads and magnetic memory cells, as well as novel magnetic logic and memory devices. However, the exchange bias effect has been optimized in materials and used in devices for decades without a good scientific understanding, both …
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Imaging magnetic order in magneto-structural phases of Mn3O4
… 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 magnetic interactions. Mn3O4 is known to …
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Spin cluster expansion approach to the interplay between short-range order and interstitial atoms in austenitic stainless steels
… HE process. To quantitatively investigate the interactions between SRO and interstitials, thermodynamic modeling approaches are essential for sampling alloy configurations. The cluster expansion (CE) method, combined with Monte Carlo (MC) simulations, provides a powerful computational framework …
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Synthesis and characterization of cobalt-containing perovskite-type oxides
… produced the new oxyfluoride LaSrCoFeO5F. Magnetic interactions between Co2+(3+) ions and ions such as Fe3+, Mn3+, Cr3+, Ni2+ in different perovskite-type structures were also studied and a range of magnetically ordered materials, at low and room temperatures, were investigated.
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Near-Infrared Luminescent Lanthanide Complexes of Quinolinol Ligands: Structure/Properties Relationship
… is significantly affected by the supramolecular interactions in the crystal packing. The study of the magnetic properties of erbium quinolinolates evidences small magnetic interactions, due to the supramolecular arrangement, relevant in the optical behaviour of optically active ErIII derivatives. …
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