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Topic Area: Nanomagnetics
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Displaying records 31 to 40 of 201 records.
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31. Model for Collimated Spin Wave Beam Generated by a Single Layer, Spin Torque Nanocontact
Topic: Nanomagnetics
Published: 4/1/2008
Authors: Mark Hoefer, Thomas J Silva, Mark D Stiles
Abstract: A model of spin torque induced magnetization dynamics based upon semi-classical spin diffusion theory for a single layer nanocontact is presented. The model incorporates effects due to the current induced Oersted field and predicts the generation of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620609

32. Spin Transfer Torques
Topic: Nanomagnetics
Published: 4/1/2008
Authors: D Ralph, Mark D Stiles
Abstract: This tutorial article is designed for beginning graduate students who are interested in the physics of spin transfer torques in magnetic devices. We provide an elementary discussion of the mechanism of spin transfer torque, and review the theoretical ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620024

33. 'Ballistic' vs. 'Diffusive' Transport in Current-Induced Magnetization Switching
Topic: Nanomagnetics
Published: 12/21/2007
Authors: N Theodoropoulou, A Sharma, W Pratt, J. Bass, Mark D Stiles, J Xiao
Abstract: We test whether current-induced magnetization switching due to spin-transfer-torque in ferromagnetic/non-magnetic/ferromagnetic (F/N/F) trilayers changes significantly when scattering within the N-metal layers is changed from ballistic to diffusive. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620018

34. A Numerical Method to Solve the Boltzmann Equation for a Spin Valve
Topic: Nanomagnetics
Published: 10/1/2007
Authors: J Xiao, A Zangwill, Mark D Stiles
Abstract: We present a numerical algorithm to solve the Boltzmann equation for the electron distribution function in magnetic multilayer heterostructures with non-collinear magnetizations. The solution is based on a scattering matrix formalism for layers that ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620591

35. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620597

36. Manipulation of the Vortex Motion in Nanostructured Ferromagnetic/Superconductor Hybrids
Topic: Nanomagnetics
Published: 4/30/2007
Authors: A V Silhanek, W Gillijns, V V Moshchalkov, V Metlushko, F Gozzini, B Ilic, Willard C Uhlig, John Unguris
Abstract: The authors investigate the rectified motion of vortices in superconducting films deposited on top of a close-packed array of open in-plane magnetized triangular micromagnets. The dc voltage induced by the vortex drift under an ac excitation is reco ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620593

37. Adiabatic Domain Wall Motion and Landau-Lifshitz Damping
Topic: Nanomagnetics
Published: 1/1/2007
Authors: Mark D Stiles, W Saslow, Michael J Donahue, A Zangwill
Abstract: Recent theory and measurements of the velocity of current-driven domain walls in magnetic nanowires have re-opened the unresolved question of whether Landau-Lifshitz damping or Gilbert damping provides the more natural description of dissipative mag ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620595

38. Identification of the dominant precession damping mechanism in Fe, Co, and Ni by first-principles calculations
Topic: Nanomagnetics
Published: 1/1/2007
Authors: Keith Gilmore, Y Idzerda, Mark D Stiles
Abstract: The Landau-Lifshitz equation reliably describes magnetization dynamics using a phenomenological treatment of damping. This paper presents first-principles calculations of the damping parameters for Fe, Co, and Ni that quantitatively agree with exist ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620594

39. Implementation of a Non-Equilibrium Green's Function Method to Calculate Spin Transfer Torque
Topic: Nanomagnetics
Published: 1/1/2007
Authors: Christian Heiliger, M Czerner, B Yavorsky, I Mertig, Mark D Stiles
Abstract: We present an implementation of the steady state Keldysh approach in a Green function multiple scattering scheme to calculate the non-equilibrium spin density. This density is used to obtain the spin transfer torque in junctions showing the magneto r ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620015

40. SEMPA Imaging for Spintronics Applications
Topic: Nanomagnetics
Published: 1/1/2007
Authors: John Unguris, Daniel Thornton Pierce, Seok-Hwan Chung
Abstract: Scanning Electron Microscopy with Polarization Analysis (SEMPA) provides high resolution (10 nm) magnetization images simultaneously with, but independent of, the topography. Such information is very useful in studying spintronics devices as illustr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620006