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 20 of 35 for “"Spin Current"”.
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Decoherence of Transverse Electronic Spin Current in Magnetic Metals
Transport of spin angular momentum (spin currents) in magnetic thin films is important for non-volatile spin-based memory devices and other emerging information technology applications. It is especially important to understand how a spin current propagates across interfaces and how a spin current …
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Landauer's theory of charge and spin transport in magnetic multilayers
… Keldysh formalism has been used 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 …
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Spin pumping measurements at interfaces between magnetic metal or insulator and organic semiconductors
Over the last 16 years, organic spintronics has developed into a striving field with exciting reports of extremely long spin diffusion lengths and spin relaxation times in organic semiconductors (OSCs). Easily processed and inexpensive, OSCs are a strong alternative to inorganic materials for use …
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Spin Transport in Organic Semiconductors
… potential for use in solid state devices for spintronics and spin-based information processing. Organic semiconductors composed of mainly light elements appeal to the field of spintronics due to their long spin lifetime originating from their weak spin-orbit coupling. The significant progress …
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Electrical injection and detection of spin polarization in InSb/ferromagnet nanostructures
We present studies of the electical detection of spin injection and transport in InSb/CoFe heterostructures. As a narrow gap semiconductor, InSb has a high mobility and strong spin-orbit interaction. Using ferromagnetic CoFe, lateral InSb/CoFe devices are fabricated by semiconductor processing …
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Interface-driven spin-orbit torques in magnetic heterostructures
The connection between charge and spin transport in solid state materials offers new techniques for generating and detecting spin currents and could potentially allow high-performance memory and logic devices. Simple multilayer thin films or "heterostructures" such as Pt/Co have broken inversion …
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Injection, transport and detection of spin currents in organic semiconductors
Research on spin current transport has so far been concentrated around metals, ferromagnetic insulators and inorganic semiconductors, but is still relatively scarce in organic semiconductors. Recently, there have been a few attempts at exploring spin pumping into polymers, which showed promising …
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Taking Steps Towards Superfluid-like Spin Transport in Metallic Ferromagnets
… of electrons. Recent works in the field of spintronics have focused on using magnetic excitations (e.g., spin waves) instead of electrons as a means of information transport without Joule heating. However, realizing long distance information transport using conventional spin waves has proven …
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Harnessing Magnetic Switching and Dynamics Using Electron and Magnon Spin Currents
Spintronics exploits the intrinsic spin of the electron in addition to its fundamental charge for designing next-generation electronic devices, with the purpose of reducing power consumption and enabling novel computing functions. The manipulation, transmission, and detection of spin information …
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Optical studies of current-induced spin-orbit effects in magnetic systems
… of magnetic moments is essential for future spintronics applications, in which the intrinsic spin of the electron is utilized in addition to the electron charge for data processing and storage. Spin-orbit-interaction-induced phenomena, including the spin Hall effect, Rashba-Edelstein effect …
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Tunable spin-charge conversion in vanadium dioxide
Spin-based electronic devices rely on the interplay of spin and charge degree of freedom of electrons and are emerging as a promising beyond CMOS technology. Fast, scalable, low energy consumption magnetic memories and nonvolatile spin logic devices have been demonstrated utilizing …
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Magnetism and superconductivity out of equilibrium: Towards ultrafast superconducting spintronics
The integration of superconductors in spintronic devices can enhance their performance. For instance, superconducting spintronics may enable the development of suitable memories for cryogenic computing systems, which ideally should operate at a higher speed than current technologies. Femtosecond …
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Polarization dependent photocurrents in thin films of the topological insulator Bi₂Se₃
… topological insulator include the flow of pure spin currents and topological protection. Pure spin current, distinct from electric current, is a net flow of spin without a net flow of charge. Recent research at MIT has revealed that shining circularly polarized laser light on a topological …
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Understanding transport processes of organic semiconductors via magnetic resonance methods
… for the solution-processed conjugated polymers. Spins of the mobile electrons, as another degree of freedom aside from charge, are able to serve as a probe to understand the transport processes of the carriers in microscopic scales. The electron spin resonance method excites the precession of …
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Thermal Effects on Spin Currents in Non-Local Metallic Spin Valves
<p>The study of non-local spin valves (NLSVs) has recently proven to be a fertile area for both applied and fundamental research in nanomagnetism due to the unique ability to separate charge currents and spin currents. NLSVs may also prove essential for a new class of high-density hard disk read …
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Novel Phenomena Induced by Magnon-Magnon and Magnon-Spin Coupling
… a new opportunity for the development of spintronics and magnonics with low power consumption. While several approaches have been proposed for generating topological magnonic surface states, they usually require materials with either special crystal symmetries or artificially modulated …
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Probing the Behaviour of Antiferromagnets: Electric and Magnetic Measurements Across a Range of Length-scales
The spin Hall effect (SHE) describes the generation of a spin current orthogonal to an applied charge current within a heavy metal, whilst the spin Seebeck effect (SSE) refers to the generation of a spin current due to thermal gradients within a magnetic material. Both effects have attracted …
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Energy efficient hybrid computing systems using spin devices
<p>Emerging spin-devices like magnetic tunnel junctions (MTJ's), spin-valves and domain wall magnets (DWM) have opened new avenues for spin-based logic design. This work explored potential computing applications which can exploit such devices for higher energy-efficiency and performance. The …
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Ultrafast Spin-Charge Conversion Schemes in Magnets: THz Time Domain Spectroscopy Study
… candidate for the next generation technology is spintronics. The use of the spin degree of freedom as the information carrier can not only complement the existing charge-based functionalities but also opens a wide scope of new solutions. Most importantly, spintronics offers energy-efficient …
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Picosecond Spin Seebeck Effect in Magnetic Insulators
The spin Seebeck effect (SSE) refers to spin current generation in a magnetic insulator/non-magnetic metal heterostructure due to a thermal gradient and most SSE experiments typically use an electric current as heat source. This study uses Terahertz (THz) time-domain emission spectroscopy where a …
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