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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 18 of 18 for “"Magnetic hysteresis"”.
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Design of materials with small magnetic hysteresis: the unexpected role of magnetostriction.
… of the single domainstate on the shoulder of the hysteresis loop show that this method fails to predict the width of the hysteresis loop, a conclusion referred to as the ’coercivity paradox.’ We argue that the basic idea of using micromagnetics to predict coercivity is reasonable, but the fault …
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Modeling of magnetorheological elastomers
… and reversibly change with the application of a magnetic field. MREs are composed of a non-magnetic polymer matrix embedded with magnetic particles. These materials can also demonstrate magnetostriction, with large strains compared to the magnetostriction seen in crystalline solids. Ultrasoft …
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Magnetic and Mechanical Properties of Ultrasoft Magnetorheological Elastomers
… (MREs), composite materials consisting of magnetic particles embedded in a non-magnetic elastomeric matrix, can reversibly modulate their mechanical and magnetic properties through tuning the applied magnetic field <em>H</em>. Recently, ultrasoft MREs have received tremendous attention due …
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Synthesis and Characterization of Surface-Functionalized Magnetic Polylactide Nanospheres
… magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest for a variety of biomedical applications including magnetic field-directed drug delivery and magnetic cell separations. Small magnetite nanoparticles are desirable due to their established biocompatibility and …
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Magnetic properties of block-copolymer fabricated cobalt nanodots and nanowires at elevated temperatures
… scale are useful for electrical, optic, and magnetic applications such as memory storage. Using block copolymer fabrication methods, 60nm diameter cobalt nanodots and 37nm wide cobalt nanowires were created, both with heights of 20nm. To characterize the reliability of the nanodots, magnetic …
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Estudo da dupla Perovskita La2MnFeO6 preparada por reação de estado sólido
… heat measurements, the LFMO’s have a ferrimagnetic phase transition at approximately 10 K, as data fit using the medium field theory. Peaks in the specific heat of the samples at higher temperatures were observed, occurring at different temperatures, depending on the degree of ordering of …
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New features in the phase diagrams of the cuprate high-Tc superconductors mapped using strong magnetic fields
… the cuprate high-Tc superconductors using high magnetic field electrical transport measurements. These discoveries attempt to address two central questions pertaining to how the physics of the cuprate high-Tc superconductors evolve as a function of both temperature and hole-doping. The first …
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Synthesis and Characterization of Polylactide-siloxane Block Copolymers as Magnetite Nanoparticle Dispersion Stabilizers
… magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest in a variety of biomedical applications, including magnetic field-directed drug delivery and magnetic cell separations. Small magnetite nanoparticles are desirable due to their established biocompatibility and …
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Molecular-based magnets constructed from cyanometalate building blocks
… preparation of molecular-based magnets with high magnetic ordering temperatures: they can be easily prepared from well-characterized cyanometalate building blocks, the metal centers are linked covalently into a 3D network, and a wide range of metals with different spin states and oxidation states …
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Synthesis, molecular and solid state structures, and magnetic properties of sandwich lanthanide phthalocyanines lacking C-H bonds
… M = Tb, Dy, Lu, Y. Single molecular magnetic (SMM) behavior in the (F_{64}Pc)_2TbH and (F_{64}Pc)_2DyH complexes was confirmed through slowed relaxation response of their magnetization in an applied time varying magnetic field during alternating current (AC) magnetic testing in the …
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Synthesis of Functionalized Poly(dimethylsiloxane)s and the Preparation of Magnetite Nanoparticle Complexes and Dispersions
… carrier fluids by ultrasonication, resulting in magnetic PDMS fluids with potential biomedical applications. Magnetite particles (100 nm to 1 mm in diameter) were prepared by crystallization from goethite/glycol/water solutions under pressure. Two methods for particle growth were investigated in …
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Magnetic Induction for In-situ Healing of Polymeric Material
… ability to heal when exposed to an alternating magnetic field. Several types of magnetic particulate were inspected for use in the production of polymer composite test samples. The types of particulate used in sample production were two supplies of γ-Fe₂O₃, one supply of α-Fe₂O₃, and one supply …
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Planar Tunneling Into YBCMO (M = Zinc, Nickel) Thin Films
… doping concentration, temperature and applied magnetic field. Tunnel junctions are fabricated with either Bi or Pb as a counter-electrode, ex-situ, on thin films grown by off-axis DC magnetron sputter deposition from single stoichiometric targets. Films are grown in different crystallographic …
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Pressure Tuned Magnetism in d- and f-Electron Materials
… Liquid states as well high T$_C$ cuprate and magnetically mediated superconductivity. In this thesis I present work on three materials in which it may be possible to tune the system through a magnetic QPT with the application of hydrostatic pressure. Although the details of the underlying …
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Electrical and magnetic properties of twin-free single-crystal praseodymium-doped YBa2Cu3O7-d
… The quality of these samples was shown by both magnetic and electrical transport measurements. Each of these methods showed that our samples had sharp superconducting transitions. We measured the magnetic relaxation of four detwinned single crystals of Y1-xPrxBa2Cu307.o, with x = 0, 0.1, 0.2, …
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Computational modeling and simulation of nonlinear electromagnetic and multiphysics problems
In this dissertation, nonlinear electromagnetic and multiphysics problems are modeled and simulated using various three-dimensional full-wave methods in the time domain. The problems under consideration fall into two categories. One is nonlinear electromagnetic problems with the nonlinearity …
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Magnetic Characteristics of Carboniferous Continental Depositional Systems: Implications for the Recognition of Depositional Hiatuses
Quaternary magnetic studies have provided the conceptual framework to bridge magnetic studies into ancient systems. In cases where environmental materials have been subjected to diagenetic alteration two questions come to mind: 1) What part of the magnetic signal is preserved in the rocks; and 2) …
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Unconventional superconductivity in topological insulator and magnetic Josephson junctions
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms