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Search Publications by: Mark D. Stiles (Fed)

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Displaying 101 - 125 of 368

Intrinsic Spin Torque Without Spin-Orbit Coupling

December 21, 2015
Author(s)
Kyoung-Whan Kim, Kyung-Jin Lee, Hyun-Woo Lee, Mark D. Stiles
For non-uniform magnetic textures, we derive an intrinsic contribution to the non-adiabatic spin torque that may be the dominant contribution. It differs from previously considered contributions in several ways. It does not depend on the change in

The NIST Plan for Providing Public Access to Results of Federally Funded Research

October 27, 2015
Author(s)
Katherine E. Sharpless, Regina L. Avila, Sally S. Bruce, Wo L. Chang, Robert M. Dimeo, Virginia Covahey, Alan K. Dohne, Heather M. Evans, Aaron P. Fein, Donna J. Kimball, Andrea M. Medina-Smith, Alan E. Munter, James K. Olthoff, Dianne L. Poster, Kathleen M. Roberts, Susannah B. Schiller, John H. Scott, Barbara P. Silcox, James A. St Pierre, Mark D. Stiles
Documentation of the evolution of NIST's plan for providing public access to results of federally funded research is provided, including the plan itself, responses to comments made by NIST staff, and public comments received in response to a request for

Angular dependence of spin-orbit spin-transfer torques

April 6, 2015
Author(s)
Ki-Sueng Lee, Dongwook Go, Aurelien Manchon, Paul M. Haney, Mark D. Stiles, Hyun-Woo Lee, Kyung Jin Lee
In ferromagnet/heavy metal bilayers, an in-plane current gives rise to spin-orbit spin transfer torques. For two-dimensional free-electron and tight-binding models with Rashba spin-orbit coupling, these torques acquire nontrivial dependence on the

Probing electric field control of magnetism using ferromagnetic resonance

January 29, 2015
Author(s)
Ziyao Zhou, Morgan Trassin, Ya Gao, Yuan Gao, Diana Qiu, Khalid Ashraf, Tianxiang Nan, Xi Yang, Samuel R. Bowden, Daniel T. Pierce, Mark D. Stiles, John Unguris, Ming Liu, Brandon Howe, Gail Brown, Sayeef Salahuddin, Ramamoorthy Ramesh, Nian Sun
A question of fundamental importance in multiferroic materials, such as BiFeO3, is whether the canted moment arising from the Dzyalozhinski-Moriya coupling is switchable with the application of an electric field. Since this canted moment is weak, directly

Corrosion Detection in Concrete Rebars Using a Spectroscopic Technique

January 11, 2014
Author(s)
Edward J. Garboczi, Paul E. Stutzman, Shuangzhen S. Wang, Nicos Martys, Dat Duthinh, Virgil Provenzano, Shin G. Chou, David F. Plusquellic, Jack T. Surek, Sung Kim, Robert D. McMichael, Mark D. Stiles, Ahmed M. Hassan
Detecting the early corrosion of steel in reinforced concrete is a goal that has been much pursued. Since 2010, NIST has been working on a large project to develop an electromagnetic (EM) probe that detects the actual corrosion products via spectroscopic

Measurement and Simulation of Millimeter Wave Scattering Cross-sections from Steel-Reinforced Concrete

January 11, 2014
Author(s)
Ahmed M. Hassan, Edward Garboczi, Robert McMichael, Jack T. Surek, Mark D. Stiles, David F. Plusquellic, Virgil Provenzano, Paul E. Stutzman, Shuangzhen S. Wang, Sung Kim, Michael D. Janezic, Jason Coder, Nicos Martys, David R. Novotny
Some iron oxide corrosion products exhibit antiferromagnetic magnetic resonances (AFMR) at around 100 GHz at normal temperatures. AFMR can be detected in laboratory conditions, which serves as the basis for a new non-destructive spectroscopic method for

Current-induced torques and interfacial spin-orbit coupling

December 19, 2013
Author(s)
Kyung-Jin Lee, H.-W. Lee, Aurelien Manchon, Mark D. Stiles, Paul M. Haney
In bilayer systems consisting of an ultrathin ferromagnetic layer adjacent to a metal with strong spin-orbit coupling, an applied in-plane current induces torques on the magnetization. The torques that arise from spin-orbit coupling are of particular

Chirality from interfacial spin-orbit coupling effects in magnetic bilayers

November 19, 2013
Author(s)
Kyoung-Whan Kim, Hyun-Woo Lee, Kyung Jin Lee, Mark D. Stiles
Spin-orbit coupling causes many properties that make magnets technologically important as well as properties that interfere with optimal performance. As nanomagnetic devices scale to smaller sizes, spin-orbit coupling due to the broken structural inversion

Spin-Wave Propagation in the Presence of Interfacial Dzyaloshinskii-Moriya Interaction

November 4, 2013
Author(s)
Jung-Hwan Moon, Soo-Man Seo, Kyung Jin Lee, Kyoung-Whan Kim, Jisu Ryu, Hyun-Woo Lee, Robert McMichael, Mark D. Stiles
In ferromagnetic thin films, broken inversion symmetry and spin-orbit coupling give rise to interfacial Dzyaloshinskii-Moriya interactions. Analytic expressions for spin-wave properties show that the Dzyaloshinskii-Moriya interaction leads to non

Self-consistent calculation of spin transport and magnetization dynamics

October 10, 2013
Author(s)
Kyung Jin Lee, Mark D. Stiles, Hyun-Woo Lee, Jung-Hwan Moon, Kyoung-Whan Kim, Seo--Won Lee
A spin-polarized current transfers its spin-angular momentum to a local magnetization, exciting various types of current-induced magnetization dynamics. So far, most studies in this field have focused on the direct effect of spin transport on magnetization