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Topic Area: Nanomagnetics

Displaying records 41 to 50 of 219 records.
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41. Evaluating the locality of intrinsic precession damping in transition metals
Topic: Nanomagnetics
Published: 4/24/2009
Authors: Keith Gilmore, Mark D Stiles
Abstract: The Landau-Lifshitz-Gilbert damping parameter is typically assumed to be a local quantity, independent of the magnetic configuration. To test the validity of this assumption we calculate the precession damping rate of small amplitude non-uniform mod ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901357

42. Non-Adiabatic Spin Transfer Torque in Real Materials
Topic: Nanomagnetics
Published: 3/16/2009
Authors: Ion Garate, Keith Gilmore, Mark D Stiles, Allan H. MacDonald
Abstract: The motion of simple domain walls and of more complex magnetic textures in the presence of a transport current is described by the Landau-Lifshitz-Slonczewski (LLS) equations. Predictions of the LLS equations depend sensitively on the ratio betwee ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901198

43. A new connection between electricity and magnetism
Topic: Nanomagnetics
Published: 2/9/2009
Authors: Robert D McMichael, Mark D Stiles
Abstract: A Viewpoint on ``Universal Electromotive Force Induced by Domain Wall Motion,'' Shengyuan A. Yang, Geoffrey S. D. Beach, Carl Knutson, Di Xiao, Qian Niu, Maxim Tsoi and James L. Erskine.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901498

44. Bias dependence of magnetic exchange interactions: application to interlayer exchange coupling in spin valves.
Topic: Nanomagnetics
Published: 2/3/2009
Authors: Paul M Haney, Christian Heiliger, Mark D Stiles
Abstract: We study how a bias voltage changes magnetic exchange interactions. We derive a general expression for magnetic exchange interactions for open systems under a bias potential, and apply it to spin valves. We find that for metallic systems, the inte ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620602

45. Reply to Comment on Adiabatic Domain Wall Motion and Landau-Lifshitz Damping
Topic: Nanomagnetics
Published: 12/3/2008
Authors: Mark D Stiles, Wayne M. Saslow, Michael J Donahue, Andrew Zangwill
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620608

46. A New Spin on the Doppler Effect
Topic: Nanomagnetics
Published: 10/17/2008
Authors: Mark D Stiles, Robert D McMichael
Abstract: The coupling between ferromagnetism and electrical current has recently been the object of intense study because of the combination of interesting scientific developments and the potential technological impact. This coupling is mediated by spin curr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620606

47. Ab Initio Studies of the Spin-Transfer Torque in Tunnel Junctions
Topic: Nanomagnetics
Published: 5/9/2008
Authors: Christian Heiliger, Mark D Stiles
Abstract: We calculate the spin-transfer torque in Fe/MgO/Fe tunnel junctions and analyze the results in comparison to all-metallic junctions. We show that the spin-transfer torque is interfacial in the ferromagnetic layer to a greater degree than in spin-valv ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620023

48. 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

49. 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

50. '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



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