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 14 of 14 for “"Magnetic property"”.
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Fabrication and Magnetic Property Investigation of Metallic Nanowire Arrays
… Vibrating sample magnetometer (VSM) and ferromagnetic resonance (FMR) were utilized to investigate the magnetic properties of single Ni nanowire arrays of different lengths and Ni/Cu superlattice nanowire arrays. The VSM data exhibited that the magnetic easy axis of samples is parallel to the …
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Fabrication of Core-Shell Nanoparticles
… the cobalt nanoparticle (1.56 nm) enhanced the magnetic property by increasing the blocking temperature from 124 K to 235 K for nanoparticles with a copper shell. The formed gold shell (0.67 nm) enhanced the cobalt nanoparticle magnetic property by increasing the blocking temperature above room …
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Magnetic analysis of nuclear pressure vessel steels and other ferromagnetic materials subject to neutron irradiation and heat treatment
Mechanical and magnetic property changes due to neutron irradiation and heat treatment were investigated for the sake of developing a nondestructive method of monitoring nuclear pressure vessel steel embrittlement during reactor operation. Four kinds of samples, including pressure vessel steel, …
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Growth, phase transformation, and self-assembly in iron oxide and uranium oxide nanostructures
… electron microscopy, analytical chemistry, and magnetic property measurements, in an attempt to answer fundamental questions about the processes of nanoparticle growth and phase transformation and their assembly into larger—but still nanoscale—objects. This work documents the formation of …
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Design of Resistivity Instrumentation for a He3 Cryostat and its Application to the Charge Density Wave Superconductor CuxTiSe2
… the new measurement system and a Quantum Design Magnetic Property Measurement System (MPMS). Methods for determining the doping revealed that the old resistivity system would not be able to determine the CDW transition temperature of highly doped samples or doping for elongated samples due to …
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Influence of Mechanical Loading and Temperature on the Magnetic Properties of FeCo-2V Soft Magnetic Alloy
… an investigation into the mechanical and magnetic responses of FeCo-2V alloy under various loading and thermal conditions, aiming to elucidate the mechanisms behind magnetic property degradation during service. By integrating advanced characterisation techniques, including in situ Digital …
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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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Electrical And Magnetic Separation Of Particles
… Among these categories, electrical and magnetic separations are of great interest in recent researches. The overall objective of this dissertation is to advance our current knowledge on these two particle separation technologies. Accordingly, it has two major parts:: 1) Charge …
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Synthesis, Characterization and Applications of Europium Based Perovskite Oxide Nanoparticles
… materials possess unique physical, chemical, magnetic and dielectric properties which make them potential candidates for a wide range of applications such as electronics, energy storage and photocatalysis. There are a number of synthesis methods for preparing these materials, where most of …
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Magnetic properties measurement of new magnetic material : SOMALOY 700 (5P)
… and more comfortable way. Presently, electromagnetic technology is improving day by day and most of the current electrical machines require the magnetic cores to operate at higher frequency to meet the demand of high–speed performance in catching up the aggressive technological evolution. On …
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Novel Magnetic Resonance Techniques as Applied to Metallic Phases in Lithium-Ion Battery Electrodes
… properties of the metallic phases were probed by magnetic resonance methods: Electron Paramagnetic Resonance (EPR), Nuclear Magnetic Resonance (NMR) and Dynamic Nuclear Polarisation (DNP), as well as magnetic property measurements, all at variable temperature (VT). In addition to providing insight …
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Lanthanide-based single-molecule magnets: A rational design by chemical intuition
… theoretical tools to investigate the dynamics of magnetic properties of the Dy1 and compared with the theoretical results for Dy2 to gain insight on the contribution of covalency, crystal field effect and the role of aromaticity in stabilizing the excited magnetic levels of a single-molecule …
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Fabrication of Three-Dimensionally Ordered Nanostructured Materials Through Colloidal Crystal Templating
… obtained if the templates are left intact. The magnetic behavior of metal (such as Ni and Co) meshes and sphere arrays has been investigated. These nanoscale arrays show significantly enhanced coercivities compared with bulk metals, due to the size effect of the nanometer dimensions of the …
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Vectorial Magnetic Properties Measurement of Electrical Steel under Triaxial Stress and Different Temperature Conditions
Electromagnetic devices, such as electrical machines and transformers, play crucial roles in electrical energy conversion and transmission. As the focus on global warming and carbon emissions grows, reducing their losses and improving efficiency has become a top priority. However, designing …