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Search Publications by: Robert D. McMichael (Assoc)

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Displaying 101 - 125 of 314

A new connection between electricity and magnetism

February 9, 2009
Author(s)
Robert D. McMichael, Mark D. Stiles
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.

400-Fold Reduction in Saturation Field by Interlayering

January 13, 2009
Author(s)
William F. Egelhoff Jr., John E. Bonevich, Philip Pong, John Unguris, Robert D. McMichael, Gery R. Stafford, Carlos R. Beauchamp
The buildup of stress with increasing thickness of magnetic thin films is a common phenomenon that often induces undesirable saturation fields that can convert an otherwise magnetically soft film into a magnetically hard one. We have found that by

A New Spin on the Doppler Effect

October 17, 2008
Author(s)
Mark D. Stiles, Robert D. McMichael
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 current

A Mean-Field Model of Extrinsic Line Broadening in Ferromagnetic Resonance

October 16, 2008
Author(s)
Robert D. McMichael
A model of ferromagnetic resonance in inhomogeneous films is described that includes interactions in a mean-field approximation. The mean-field model yields linewidth values that span the range from intrinsic linewidth for strong interactions to fully

Shape Effects in Ferromagnetic Resonance of Nanosize Rectangular Permalloy Arrays

October 16, 2008
Author(s)
Martha Pardavi-Horvath, Robert D. McMichael
In-plane and out-of-plane ferromagnetic resonance measurements were performed on arrays of Permalloy rectangles, prepared by interference lithography. In the absence of crystalline anisotropy, the shape anisotropy dominates the angular dependence of the

The Periodic Table of Damping in Doped Ni 80 Fe 20 Thin Films

October 16, 2008
Author(s)
J O. Rantschler, D Pulugurthaand, Andrew P. Chen, L M. Connors, Audie M. Castillo, Alexander J. Shapiro, William F. Egelhoff Jr., Brian B. Maranville, Robert D. McMichael
The effect of doping on the magnetic damping parameter of Ni80Fe20 is measured for 21 transition metal dopants:Ti, V, Cr, Mn, Co, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Hf, Ta, W, Re, Os, Ir, Pt, and Au. For most of the dopants, the damping parameter increases

Thickness Dependence of Magnetic Film Edge Properties in Ni 80 Fe 20 Stripes

October 16, 2008
Author(s)
Robert D. McMichael, C A. Ross, V P. Chuang
Measurements of trapped spinwave edge modes in transversely magnetized stripe arrays of Ni80Fe20 largely confirm pervious theoretical predictions for the thickness dependence of the edge saturation field Hsat and the effective out-of-plane edge anisotropy