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 17 of 17 for “"magnetic multilayers"”.
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Interlayer exchange coupling in magnetic multilayers
… discovery of the exchange coupling between ferromagnetic layers separated by nonmagnetic spacer layers has stimulated a great deal of interest recently. We present a theoretical study of the interlayer coupling in magnetic multilayers using two theoretical approaches. One such approach is to …
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Thermal transport in two-dimensional materials and magnetic multilayers
… Lastly, I study thermal transport properties of magnetic tunnel junctions (MTJs). MTJs show interesting charge and spin dynamics when they are subject to temperature gradient, such as the tunnel-magneto Seebeck effect and spin Seebeck tunneling. To harness the thermally induced spin behaviors, it …
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Giant Magnetoresistance in Magnetic Multilayers Using a New Embossed Surface
… advantages for the technology sector of magnetic sensing.
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Landauer's theory of charge and spin transport in magnetic multilayers
… to study the spin transport effects found in magnetic multi-layered nanostructures. We formulate a new methodology based on Landauer and show it to be in very good qualitative agreement with Keldysh. However, our theory provides more information regarding the physics of these effects because …
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Green function studies of the interlayer exchange coupling in magnetic multilayers
The Interlayer Exchange Coupling (IEC) of magnetic multilayers has been one of the most studied problems in condensed matter physics for the last decade. It is found that for a multilayer structure in which magnetic layers are separated by a spacer, the magnetic moments of each layer orient …
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Magneto-transport properties of giant magnetoresistive systems
… conductivity and magnetoresistivity in both ferromagnetic/non-magnetic multilayers and granular solids which exhibit the giant magnetoresistance effect.
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Properties of cobalt/copper and cobalt/palladium multilayers.
The physical properties of Co/Cu and Co/Pd magnetic multilayers have been studied. The Co/Cu multilayers were prepared by sputtering, while the Co/Pd multilayers were made by sputtering and molecular beam epitaxy (MBE). Various x-ray diffraction techniques have been used to study the structure of …
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Giant Magnetoresistance and Quantum Transport in Magnetic Hybrid Nanostructures.
… device structures to be made. Among these, magnetic multilayers, superconductor/normal metal junctions and carbon nanotubes exhibit a rich variety of features, with the potential for future generations of electronic devices with improved sensitivity and higher packing density. The modeling …
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Novel Phenomena Induced by Magnon-Magnon and Magnon-Spin Coupling
… thesis, I show that in antiparallelly aligned magnetic multilayers, the longrange, chiral dipolar interaction between propagating magnons generates bulk bands with non-zero Chern integers and magnonic surface states carrying chiral spin currents. The surface states are highly localized and can …
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Current-induced torques in ferromagnets at room temperature
This thesis uses ferromagnetic resonance to explore the current-induced torques (CITs) in two different systems, namely YIG/heavy metal bilayers and bulk NiMnSb, at room temperature. We apply a microwave current to the sample while sweeping the external magnetic field, and measure the longitudinal …
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Magnetic domain walls driven by interfacial phenomena
A domain wall in a ferromagnetic material is a boundary between differently magnetized regions, and its motion provides a convenient scheme to control the magnetization state of the material. Domain walls can be confined and moved along nanostrips of magnetic thin films, which are proposed …
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Interactive Spin Dynamics in Magnon and Quantum Spin Systems
… of spins, known as spin waves or magnons, in magnetic materials, and optically active spin defects as represented by nitrogen-vacancy (NV) centers in diamond, leading to the prosperity of magnonics, quantum sensing, and quantum information processing. As the understanding of dynamics in …
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Thin film magnetics for integrated magnetic nano-structures
… seen a surge in demand for highly miniaturised magnetic components which has been enabled by use of power circuitry high switching frequencies which require energy storage on a smaller scale. The optimal scale of this integration will be achieved with the complete integration of the power supply …
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Multi-channel tag based on fluid-suspended magnetic microparticles
… and much work has been done to make use of magnetic properties to develop viable applications. Two key areas are solid state memory, for example MRAM and hard discs, and the use of superparamagnetic nanoparticles in biological applications by using mechanical actuation. However, little has …
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Giant Magnetoresistance - eine ab-initio Beschreibung
Die vorliegende Arbeit ist ein Beitrag zur Theorie des spinabhängigen Transports in magnetischen Vielfachschichten. Es wird erstmalig eine parameterfreie Beschreibung des Giant Magnetoresistance (GMR) vorgelegt, welche detaillierte Einsichten in die mikroskopischen Vorgänge gestattet. Die ab-initio …