Dresden 2009 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Micro Magnetism / Computational Magnetism
MA 19.2: Vortrag
Mittwoch, 25. März 2009, 10:30–10:45, HSZ 403
Proposal for a Standard Problem for Micromagnetic Simulations Including Spin-Transfer Torque — Massoud Najafi1, •Benjamin Krüger1, Stellan Bohlens1, Matteo Franchin2, Hans Fangohr2, Markus Bolte1, Antoine Vanhaverbeke3, Rolf Allenspach3, Ulrich Merkt1, Daniela Pfannkuche1, Dietmar Möller1, and Guido Meier1 — 1Universität Hamburg, Hamburg, Germany — 2University of Southampton, Southampton, United Kingdom — 3IBM Zurich Research Laboratory, Rüschlikon, Switzerland
The spin-transfer torque between itinerant electrons and the magnetization in a ferromagnet is of fundamental interest for the applied physics community. To investigate the spin-transfer torque powerful simulation tools are mandatory. For a comparison of different simulation tools it is important to develop standard problems that can be simulated by different tools and allow us to easily verify the implementation. Previous standard problems do not include spin-transfer torque. We propose a micromagnetic standard problem, including the spin-transfer torque, that can be used for the validation and falsification of micromagnetic simulation tools. The work is based on the micromagnetic model extended with the spin-transfer torque terms proposed by Zhang and Li [1]. The suitability of the proposed problem as a standard problem is proven by numerical results from four different finite-difference-method and finite-element-method based simulation tools.
[1] S. Zhang and Z. Li, Phys. Rev. Lett. 93, 127204 (2004).