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Publication Citation: First-Principles Calculation of the Non-Adiabatic Spin Transfer Torque in Ni and Fe

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Author(s): Keith Gilmore; Ion Garate; Allan H. MacDonald; Mark D. Stiles;
Title: First-Principles Calculation of the Non-Adiabatic Spin Transfer Torque in Ni and Fe
Published: December 16, 2011
Abstract: The magnetization dynamics of a ferromagnet subjected to an electrical current are given by an extension of the Landau-Lifshitz-Gilbert equation that contains two additional terms, the adiabatic and non-adiabatic spin-transfer torques. First-principles calculations of the non-adiabatic spin-transfer torque parameter beta for bcc iron and fcc nickel show that beta is related to and on the same order as alpha, the damping constant, but is distinct from it.
Citation: Physical Review B
Volume: 84
Issue: 22
Keywords: spin-transfer torque; spin-orbit coupling; spin transport; current-induced domain wall motion; magnetic nanowire; nanomagnetics; transition metals; magnetic damping; Landau-Lifshitz
Research Areas: Nanomagnetics
PDF version: PDF Document Click here to retrieve PDF version of paper (410KB)