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 15 of 15 for “"Magnetic Switching"”.
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Harnessing Magnetic Switching and Dynamics Using Electron and Magnon Spin Currents
… information require effective control of the magnetic orientation and dynamics in magnetic materials, which can be realized by the interactions between magnetic moments and spin currents. In this thesis, we explore two types ofspin currents, as carried by conduction electrons and magnons, …
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Room temperature spin-orbit torque switching induced by a topological insulator
… pursued to realize efficient spin-orbit torque switching. However, so far current-induced magnetic switching with topological insulators has been observed only at cryogenic temperatures. Whether the topologically protected electronic states in topological insulators can benefit to spintronic …
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Magnetic Logic Gate Using Ferromagnetic Hexagonal Nanodots
A study of magnetic states of equal-sided hexagonal 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 …
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Templated self-assembly of multiferroic nanocomposites
… coupling that takes place between the ferrimagnetic spinel phase, which forms discrete vertical pillars, arid the ferroelectric perovskite phase, which forms a matrix that surrounds the spinel pillars. Here, after an in-depth study of the mechanisms responsible for the formation of this …
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Optical control and probe of ferromagnetic and ferroic orders in films, heterostructures, and perovskite-based material systems
This dissertation is focused on ferromagnetic, multiferroics, and two-dimensional (2D) perovskites, exploring different unique collective magnetic and ferroic characters: (1) ferromagnetic thin film Co/Pd multilayers, (2) BaTiO3-BiFeO3 (BTO-BFO) a magneto-electric materials system, and (3) CuCl4 …
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Magnetic structures and proximity effects in rare-earth / transition metal ferromagnetic and superconductor systems
The antiferromagnetic coupling between a rare-earth (RE) and a tran- sition metal (TM) ferromagnet can be exploited to engineer normal state and superconducting functional devices. RE/TM ferromagnetic multi- layers were previously used as spin-mixers to generate spin-triplet su- percurrents. This …
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Field and current induced magnetization reversal in patterned Pseudo Spin Valve devices
The field and current induced magnetization switchings of Pseudo-Spin-Valve (PSV) devices are described in this dissertation. An aligned sequence of three (one optical and two electron-beam) lithographies was used to define the devices and their electrical contacts. The PSV stack comprised a layer …
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Magnetic Switches as Active Device Replacements for Harsh Environments
… the use of the archetypical pulsed power magnetic switching devices in alternative and novel methods. The primary motivator for investigating these applications are for the purpose of simplifying electrohydraulic drill and electrocrushing designs meant for extreme environment operation, …
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Detection of antiferromagnetic domain reversal in epitaxial insulating oxides
Antiferromagnetic materials have historically played a passive role as biasing layers in spintronics applications due to the challenges in manipulating and detecting the magnetic order. However, substituting ferromagnets by antiferromagnets as active switching elements in data storage devices …
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High performance magneto-optic garnet materials for integrated optics and photonics
… hysteresis loops of Faraday rotation, and magnetic switching behaviour) of these sputtered garnet films are investigated in this work. These garnet materials possess high quality nanocrystalline thin-film microstructures and demonstrate excellent combination of optical and magneto-optical …
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A combined experimental and computational study of Ni<sub>3</sub>Pt/Ir/Co Synthetic Ferrimagnets: taking atomistic spin simulation into the laboratory
Synthetic ferrimagnets, two ferromagnetic layers exchange coupled antiferromagnetically through a non-magnetic spacer layer, provide an interesting test bed for future all optical magnetic switching and to validate, in an experimental and engineering context, the utility of atomistic spin modelling …
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Magnetic tunnel junction devices and circuits for in-memory, neuromorphic and radiation hard computing
The magnetic tunnel junction is a memory device at the core of emerging magnetic random access memory technology. As CMOS technology is approaching its physical limits, spintronics, with benefits like non-volatility and normally-off behavior, is a promising candidate for next-generation artificial …
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Non-ideal exchange springs in DyFe2/YFe2 superlattices
Magnetic exchange spring systems have potential applications in (i) the next generation of permanent magnets and (ii) storage elements in information systems. However any practical realization of this potential will involve a study of non-ideal exchange spring behaviour. Within the context of …
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Study of growing incongruent antiferromagnetic single crystals and characterization
… as potential spintronic materials with faster switching rates compared to conventional ferromagnets. Recently reported studies have demonstrated partial switching of the Néel vector of antiferromagnetic CuMnAs and Mn2Au with current-induced spin-orbit torques. More intermetallic …