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Showing 1 to 16 of 16 for “"anisotropic magnetoresistance"”.
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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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EMERGENT PHENOMENA AND NOVEL DEVICES BASED ON SPIN-ORBIT COUPLING AT COMPLEX OXIDE INTERFACES
… anisotropy, spin relaxation, magnetic damping, anisotropic magnetoresistance, and anomalous Hall effect – allowing it to be exploited for future spin-orbitronics, especially for the logic-in-memory computing with ultralow energy consumption. The building block of such applications is a strong …
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Filmes de FePt para dispositivos da spintrônica
… prepared by sputtering. For measuring Tunnel Anisotropic Magnetoresistance (TAMR), FePt/AlOx/Au trilayers were prepared. All prepared alloys exhibited significant coercivity. In some of them, coercive fields µ0Hc > 1, 6 T at 300 K were obtained. Magnetic Force Microscopy observations were …
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Spin pumping measurements at interfaces between magnetic metal or insulator and organic semiconductors
… ratio. The biggest parasitic effect, anisotropic magnetoresistance (AMR), which arises from a change in resistance in ferromagnets during spin pumping, is studied at length using in-plane angular dependence measurements. Thirdly, spin conversion inside the semiconductor itself is …
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Spin transport in few-layer graphene
… 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 in unpatterned films of La0.67Sr0.33MnO3 (LSMO) on substrates of NdGaO3 (001), …
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Magnetoresistance effects in metallic antiferromagnets
… in this thesis is focused on characterizing the magnetoresistance of various metallic antiferromagnets to better understand the relationship between metallic conductivity and spin textures in these materials. Specifically, we studied anisotropic magnetoresistance (AMR) and unidirectional …
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Electrical gating effects on the magnetic properties of (Ga,Mn)As diluted magnetic semiconductors
… in the Curie temperature of ∼2 K and enhanced anisotropic magnetoresistance (AMR) (which at saturation reaches ∼30%) is achieved with a depletion of a few volts. Persistent magnetization switchings with short electric field pulses are also observed. The magnitude of the switching field is found …
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Design, fabrication, and characterization of magnetic nanostructures
… with metallic spacer layers showing giant magnetoresistance (GMR) were the technological basis used in the read-heads of hard disk drives. Similarly, tunnelling magnetoresistance (TMR), which is an effect typically larger than giant magnetoresistance, occurs when the metallic spacer layers …
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An Investigation of the Structure, Pinning and Magnetoresistance of Domain Walls in Ni81Fe19 Planar Nanowires
… microstructural influences on the magnetic and magnetoresistance properties, along with a thorough understanding of the effect of geometrical confinement on domain wall (DW) structure and pinning behaviour in nanowire structures. The out-of-plane structural properties of thermally evaporated …
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Quantum transport in mesoscopic systems of Bi and other strongly spin-orbit coupled materials
… further, Bi/CoFe junctions are fabricated. The anisotropic magnetoresistance of the CoFe is modifi"ed when carriers tunnel into the CoFe from Bi, possibly due to a spin dependent tunneling process or an interaction between the spin polarized density of states in CoFe and the anisotropic …
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Development and performance of a velocity control system for modern combustion-powered scooters
… The Throttle-by-Wire-System consists of an anisotropic magnetoresistance throttle position sensor and a position controlled stepper motor-driven throttle valve actuator. The sensor unit comes with a measurement deviation of less than 0.16% whereas the actuator unit can approach throttle …
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Magnetoelectric Device and the Measurement Unit
… such as search-coil, fluxgate, Hall Effect, anisotropic magnetoresistance (AMR), giant magnetoresistance (GMR), magnetoelectric (ME), magnetodiode, magnetotransictor, fiber-optic, optical pump, superconducting quantum interference device (SQUID), etc. Each of these magnetic field sensors has …
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Electric and thermoelectric properties of antiferromagnetic metals
… linked to their magnetic order. First, I used anisotropic magnetoresistance (AMR) to probe the Néel vector orientation in the collinear AF Fe$_2$As. AMR depends on the relative direction of magnetization with respect to the current, but is even in magnetization and is therefore present in AF. …
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Magnetotransport of connected artificial spin ice
Artificial spin ices are mesoscopic arrays of interacting single-domain ferromagnetic nanoislands or nanowires. With Ising-like behavior of individual magnetic moments, artificial spin ice has been utilized to investigate geometrically frustrated systems like spin ice, a class of magnetic …
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Quantum Transport and Electric-Field Effects in Layered Topological Semimetals and Magnetic Materials
… appeared at magnetic fields as low as 5 T, and magnetoresistance increased by 10,000. We argue that a thermal process underlies this improvement. Finally, Raman spectroscopy and analysis of quantum oscillations in ZrSiSe indicate that the phonon modes and Fermi surface area are unchanged by …