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 13 of 13 for “"Micromagnetics"”.
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A Numerical Study of Dynamic Micromagnetics
… for programming given, a set of software for micromagnetics calculation is developed successfully in C++. Several attempts are also made to reduce the calculation complexity. Finally this program is verified with standard problem 3 from the mumag (or micromagnetics) society. It was also used …
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Modeling Shape Effects in Nano Magnetic Materials With Web Based Micromagnetics
… on submicron magnetic material. A web based micromagnetics program is written to model the hysteresis loop of nano magnetic samples with arbitrary geometry shapes and multiple magnetic materials. Three material samples have been modeled with this program along with nano magnets with a variety …
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Magnetic Logic Gate Using Ferromagnetic Hexagonal Nanodots
… Permalloy nanodots has been conducted via micromagnetics simulation. With various side length, thickness and interior angle, magnetic state has been characterized for all hexagonal nanodots. A new boundary between single domain and vortex state on the dependency of uniaxial shape anisotropy …
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Microgmagnetics Study of "Seed" Induced Incoherent Magnetic Reversal in a Cobalt Element Array
A stochastic dynamic micromagnetics code using the LLG equation has been developed and applied to study the seed induced magnetic reversal of a cobalt element array. The spin orientation of the seed element is chosen to be antiparallel to the spin orientation of the first element in the array …
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Fabrication, characterization, and micromagnetic analysis of lithographically defined particle arrays for applications in data storage
… arrays are studied by experiments and numerical micromagnetics for ultra-high-density data storage applications. 1 00nm or 200nm period arrays of nanostructured nickel, cobalt, and cobalt phosphorus are fabricated by the techniques of interference lithography combined with evaporation and …
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Design of materials with small magnetic hysteresis: the unexpected role of magnetostriction.
… paradox.’ We argue that the basic idea of using micromagnetics to predict coercivity is reasonable, but the fault lies with presumptions; one needs to account for large but localized disturbances arising from potent defects. To investigate the prediction of coercivity in this context, we develop …
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Service-oriented grids and problem solving environments
… technologies in the scenarios of Computational Micromagnetics and Grid-enabled Engineering Optimisation and Design Search (Geodise) systems. Experiences achieved through the work can also be of referential value to future application of Grid computing in different areas.
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Spin transport in few-layer graphene
… insufficient attention has been paid to the micromagnetics of the electrodes, particularly regarding the interpretation of local magnetoresistance (MR), where the spin-valve signal can be confused with tunnelling anisotropic magnetoresistance (TAMR) at the contacts. The magnetisation-reversal …
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NONLINEAR SPIN DYNAMICS AND ULTRA-FAST PRECESSIONAL SWITCHING
… of magnetic nanoparticles and continuum micromagnetics for thin film media. The spins dynamics in both discrete and continuum versions is modeled by Landau Lifshitz type equations. These models are introduced in Chapter 2, subsequent to an overview of magnetic recording media offered in …
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A TEM investigation of controlled magnetic behaviour in thin ferromagnetic films
… and storage industries, but also for fundamental micromagnetics. To store digital information, each memory element must support two distinct remanent magnetisation configurations that can be switched between using an applied field. In magnetoresistive random access memory (MRAM), a low switching …
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Magnetization Dynamics in Ultrathin Films and Multilayers
Robust understanding of magnetization dynamics is very crucial to design and fabricate novelmaterials for next generation spintronic applications. A combination of experimental techniques and theoretical modeling facilitates fundamental research to establish new concepts. This dissertation …
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Current Induced Magnetisation Dynamics in Ferromagnetic Nanowires
… exchange or solved separately using either micromagnetics or electromagnetics (assuming a frequency dependent permeability as input). Hence there is a need for a numerical model that addresses the above challenges to model and understand the dynamic permeability in magnetic nanowire arrays …
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Ground states in artificial spin ice
Artificial spin ice is a class of arrays of interacting ferromagnetic nanoislands that are used to experimentally model Ising spin systems. It has been successfully used to understand the behavior of frustrated spin systems, particularly the class of magnetic pyrochlore oxides known as spin ice. …