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Displaying records 211 to 220.
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211. The Trade-off Between Large GMR and Small Coercivity in Symmetric Spin Valves
Topic: Nanomagnetics
Published: 1/1/1996
Authors: William F. Egelhoff Jr., P J Chen, Cedric John Powell, Mark D Stiles, Robert D McMichael, C Lin, J Sivertsen, J Judy, K Takano, A Berkowitz
Abstract: We have investigated the use of various alloys as substitutes for pure Co in the center film of symmetric spin valves of the type NiO/Co/Cu/Co/Cu/Co/NiO. The aim of this work is to identify magnetic materials that exhibit smaller coercivities than pu ...

212. Theory of Spin Polarized Secondary Electrons in Transition Metals
Topic: Nanomagnetics
Published: 1/1/1985
Authors: David R. Penn, S Apell
Abstract: We show that in contrast to the secondary-electron intensity distribution, the spin polarization, P(E), yields useful information about the electron-electron interaction. The ratio of lifetimes of majority- to minority-spin electrons can be determine ...

213. Theory of Spin Transfer Torque
Topic: Nanomagnetics
Published: 9/1/2007
Author: Mark D Stiles
Abstract: In magnetic multilayers, the spin polarized currents flowing between the magnetic layers can exert torques on the magnetizations of the layers when the magnetizations are not collinear. The theory of these spin transfer torques is developed in term ...

214. Theory of a magnetic microscope with nanometer resolution
Topic: Nanomagnetics
Published: 1/1/2001
Authors: P Johansson, S Apell, David R. Penn
Abstract: We propose a theory for a type of apertureless scanning near field microscopy that is intended to allow the measurement of magnetism on a nanometer length scale. A scanning tunneling microscope (STM) is used to scan a magnetic substrate while a laser ...

215. Tunneling Magnetoresistance With Amorphous Electrodes
Topic: Nanomagnetics
Published: 1/1/2007
Authors: M Gradhand, Christian Heiliger, P Zahn, I Mertig
Abstract: A detailed first principles analysis of the transport properties of different magnetic electrode materials for MgO tunnel junctions is performed to elucidate the microscopic origin of the TMR effect. The spin-dependent transport properties of the mag ...

216. Two Simple Tests for Models of Current-Induced Magnetization Switching
Topic: Nanomagnetics
Published: 1/1/2007
Authors: N Theodoropoulou, A Sharma, W Pratt, Mark D Stiles, J Xiao, J Bass
Abstract: We describe two simple tests for models of current-induced magnetization switching due to spin-transfer-torque in ferromagnetic/non-magnetic/ferromagnetic (F/N/F) trilayers. The first involves comparing calculated and measured values of the ratio X = ...

217. Two dimensional spectroscopic imaging of individual ferromagnetic nanostripes
Topic: Nanomagnetics
Published: 11/6/2012
Authors: Han-Jong H. Chia, Feng Guo, Lyubov Belova, Robert D McMichael
Abstract: We use ferromagnetic resonance force microscopy (FMRFM) to spectroscopically image the edge modes in individual 700 and 400 nm wide Permalloy stripes with a spatial resolution on the order of 200 nm. The imaging clearly identi es some resonances as ...

218. Vector Imaging of Magnetic Microstructure
Topic: Nanomagnetics
Published: 1/1/1989
Authors: Michael H Kelley, John Unguris, M Scheinfein, Daniel Thornton Pierce, Robert Celotta

219. What Can Polarized LEED Contribute to Surface Structure Determination?
Topic: Nanomagnetics
Published: 1/1/1984
Authors: Daniel Thornton Pierce, Robert Celotta, G Wang

220. Zigzag Shaped Magnetic Sensors
Topic: Nanomagnetics
Published: 1/1/2004
Authors: S da, Willard C Uhlig, A Kos, Jose Alberto Aumentado, Michael J Donahue, John Unguris, David P Pappas
Abstract: Magnetism in zigzag shaped thin film elements is investigated using scanning electron microscopy with polarization analysis, magneto-transport measurements, and micromagnetic simulations. We find that the angle of magnetization alternates along the l ...

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