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Micromagnetic simulations of spin-torque driven magnetization dynamics with spatially resolved spin transport and magnetization texture
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, Electrum 229, SE-16440 Kista, Sweden..
Univ Southampton, Dept Engn & Environm, Southampton SO17 1BJ, Hants, England.;European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany..
Univ Southampton, Dept Engn & Environm, Southampton SO17 1BJ, Hants, England..
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2017 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 96, no 9, 094428Article in journal (Refereed) Published
Abstract [en]

We present a simple and fast method to simulate spin-torque driven magnetization dynamics in nanopillar spin-valve structures. The approach is based on the coupling between a spin transport code based on random matrix theory and a micromagnetics finite-elements software. In this way the spatial dependence of both spin transport and magnetization dynamics is properly taken into account. Our results are compared with experiments. The excitation of the spin-wave modes, including the threshold current for steady-state magnetization precession and the nonlinear frequency shift of the modes are reproduced correctly. The giant magneto resistance effect and the magnetization switching also agree with experiment. The similarities with recently described spin-caloritronics devices are also discussed.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2017. Vol. 96, no 9, 094428
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-336032DOI: 10.1103/PhysRevB.96.094428ISI: 000411320200003OAI: oai:DiVA.org:uu-336032DiVA: diva2:1164826
Funder
Swedish Research CouncilCarl Tryggers foundation Stiftelsen Olle Engkvist ByggmästareSwedish Energy Agency
Available from: 2017-12-12 Created: 2017-12-12 Last updated: 2017-12-12Bibliographically approved

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Delin, AnnaFransson, Jonas

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