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Showing 1 to 20 of 42 for “"magnetotransport"”.
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Magnetotransport in electron waveguides
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Struktur und Magnetotransport laserdeponierter Lanthanmanganat Dünnschichtsysteme
Die vorliegende Dissertation "Struktur und Magnetotransport laserdeponierter Lanthanmanganat Dünnschichtsysteme" beschäftigt sich mit der Herstellung, den strukturellen Eigenschaften und dem Magnetotransport von ferromagnetisch-metallischen Lanthanmanganat-Schichten La0.7A0.3MnO3 (A=Sr, …
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Magnetotransport of connected artificial spin ice
… oxides. Here I detail measurements of the magnetotransport response of connected artificial spin ice to varying temperatures and magnetic fields. In the literature, transport measurements have been used simply as a tool to probe the behavior of connected artificial spin ice. Here I …
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Magnetotransport Effects in Three Dimensional Nanocircuits
… of the influence of 3D geometries on magnetotransport which is known as the first generation of spintronics, are required before we can fully realise the promise of 3D spintronics. In this thesis, we present new fabrication methods for the realisation of two types of 3D nanomagnetic …
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Magnetotransport in low dimensional semiconductor structures
… into two sets. The first concerns anisotropic magnetotransport measurements and electron focusing in a varying external magnetic field. These are performed using MBE-grown high mobility two-dimensional electron gases formed on (311)B GaAs substrates. The second is a study of magnetic field …
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Growth and magnetotransport studies of epitaxial graphene
… improvements in electronic characteristics. Magnetotransport measurements are presented which demonstrate the two-dimensional nature of the material. These can also be used to extract values for rates associated with the various scattering mechanisms present, which in turn give insight into …
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Der Einfluss der Randstreuung auf ballistischen Magnetotransport
In dieser Arbeit werden Widerstaende in ballistischen metallischen Leitern untersucht, in denen Streuung an rauen Ober flaechen die dominante Streuung ist. Dies geschieht durch eine numerische Simulation, die sich als extrem rechenintensiv herausstellt. Die betrachteten Widerst�ande sind der Hall- …
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Magnetotransport effects in lateral and vertical ferromagnetic semiconductor junctions
This work is an investigation of giant magnetoresistance (GMR), tunneling magnetoresistance (TMR) and tunneling anisotropic magnetoresistance (TAMR)effects in (Ga,Mn) based ferromagnetic semiconductor junctions. Detailed results are published in the following articles: [1] C. Rüster, T. Borzenko, …
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Magnetotransport along non parabolically confined quasi-one-dimensional channels
The one-electron spectrum, pertinent to a quantum wire in the presence of a magnetic field, is obtained for parabolic and weakly nonparabolic confining potentials. Different orientations of the magnetic field are considered and the corresponding ac and do responses of the wire are evaluated, for …
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Structural and magnetotransport study of SrTiO3-δ/Si structures grown by molecular beam epitaxy
SrTiO3 (STO) films were grown on p-Si (001) substrates using molecular beam epitaxy (MBE). Oxygen vacancies were introduced by controlling the Oxygen Pressure (PO2) that varied from 10-8 to 10-7 torr during growth, resulting in SrTiO3-δ with δ ~ 0.02% for the lowest pressure. The single phase …
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Magnetotransport in superconductor to semiconductor junctions: multiple Andreev reflections and coupling to quantum hall states
Two-dimensional electron gases (2DEGs) and superconductors share many interesting properties. Both exhibit dissipationless current flow as well as strong electron correlations which can lead to a new ground state charge carrier. In this work, coupling between superconductors and 2DEGs was studied. …
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EXPLORATION OF NEW MULTIFUNCTIONAL MAGNETIC MATERIALS BASED ON A VARIETY OF HEUSLER ALLOYS AND RARE-EARTH COMPOUNDS
Magnetic, magnetocaloric, magnetotransport and magnetoelastic properties of Ni-Mn-X (X = In, and Ga) Heusler alloys and La-Fe-Si based rare earth compounds have been synthesized and investigated by x-ray diffraction, magnetization, strain, and electrical resistivity measurements. The phase …
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Quantum-coherent transport in low-dimensional mesoscopic structures and thin films
… systems, and quantum transport as well as magnetotransport in various materials system. One overarching aim is exploring the different mechanisms that give rise to quantum phase decoherence in lithographically patterned mesoscopic structures, of importance in the field of quantum …
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Spin States in Bismuth and Its Surfaces: Hyperfine Interaction
… characteristics on the film surface. Magnetotransport measurements are carried out to extract the transport properties of theBi(111) films. Using the high quality Bi(111) film deposited on mica, we develop quantum magnetotransport techniques as delicate tools to study hyperfine …
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Nonlinear transport in two-dimensional electron gas at large filling factors.
… in microwave-irradiated 2DEG. New phenomena in magnetotransport emerged when a 2DEG was under the simultaneous influences of a dc electric field and a microwave field. The experimental observations were compared to the numerical simulations which were carried out based on a recently proposed …
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