Effect of the classical ampere field in micromagnetic computations of spin polarized current-driven magnetization processes

被引:43
作者
Carpentieri, M
Finocchio, G
Azzerboni, B
Torres, L
Lopez-Diaz, L
Martinez, E
机构
[1] Univ Messina, Dipartimento Fis Mat & Tecnol Fis Avanzate, I-98166 Messina, Italy
[2] Univ Salamanca, Dept Fis Aplicada, E-37008 Salamanca, Spain
关键词
D O I
10.1063/1.1853291
中图分类号
O59 [应用物理学];
学科分类号
摘要
Magnetization reversal by spin polarized current flowing perpendicular to pillar nanostructures with different geometries and materials is studied by means of a micromagnetic model. The spin transfer torque is included as an additional term in the Gilbert equation following previous theoretical calculations by Slonczewski. The ampere field (H(Amp)) due to the current and the dipolar antiferromagnetic coupling between the ferromagnetic layers are also taken into account. The H(Amp) plays a crucial role; in fact it can speed, retard or even inhibit the magnetization switching process depending on the kind of structure under test. The studied nanostructures are circular and elliptic nanopillars of Co/Cu/Co and permalloy/Cu/permalloy. (c) 2005 American Institute of Physics.
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页数:3
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