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Micromagnetic simulations of spin-torque driven magnetization dynamics with spatially resolved spin transport and magnetization texture

Micromagnetic simulations of spin-torque driven magnetization dynamics with spatially resolved spin transport and magnetization texture
Micromagnetic simulations of spin-torque driven magnetization dynamics with spatially resolved spin transport and magnetization texture
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.
2469-9969
1-13
Borlenghi, Simone
c34df254-ac61-4ffa-8955-14f673f5cf66
Mahani, M.R.
c70450bf-d421-4bb8-94a8-b66d12f39a85
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Franchin, M.
a50d287c-c764-4bcc-a57a-cb0580d9a2f5
Delin, Anna
f5461c24-5257-4d86-868d-c00a4b1153a2
Fransson, Jonas
54f10716-703a-466c-9f4e-c01d043e4f46
Borlenghi, Simone
c34df254-ac61-4ffa-8955-14f673f5cf66
Mahani, M.R.
c70450bf-d421-4bb8-94a8-b66d12f39a85
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Franchin, M.
a50d287c-c764-4bcc-a57a-cb0580d9a2f5
Delin, Anna
f5461c24-5257-4d86-868d-c00a4b1153a2
Fransson, Jonas
54f10716-703a-466c-9f4e-c01d043e4f46

Borlenghi, Simone, Mahani, M.R., Fangohr, Hans, Franchin, M., Delin, Anna and Fransson, Jonas (2017) Micromagnetic simulations of spin-torque driven magnetization dynamics with spatially resolved spin transport and magnetization texture. Physical Review B, 96 (9), 1-13. (doi:10.1103/PhysRevB.96.094428).

Record type: Article

Abstract

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.

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Accepted/In Press date: 14 July 2017
e-pub ahead of print date: 21 September 2017

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Local EPrints ID: 415276
URI: https://eprints.soton.ac.uk/id/eprint/415276
ISSN: 2469-9969
PURE UUID: 20825ee0-ca23-4580-b5c1-20f4a20d6128

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Date deposited: 06 Nov 2017 17:30
Last modified: 13 Mar 2019 19:18

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