Phase Diagrams and Magnetization Field-Responses of Synthetic Antiferromagnets

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概要

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•   The response to in-plane applied field of magnetizations in synthetic antiferromagnets composed of two identical ferromagnetic layers having a uniaxial anisotropy has been investigated by analytic/numeric method using the Stoner-Wohlfarth single-domain model. Evolution of the stable magnetization configuration phase diagram with increasing exchange coupling between the ferromagnetic layers is presented, in both two-magnetization-angle-parameter space and in-plane-field space. It is revealed that the phase diagram in the angular-space is composed of magnetization-configuration phase domains classified into three groups, some of which can be further classified into sub-groups. A complicated five-step diagram evolution in the field space is shown to be explained comprehensively through the comparison to that in the angular space. It is also revealed that the non-parallel magnetization configurations can be classified into two, one existing for all exchange coupling strengths and the other starting to appear at a critical value. Toggle switching is shown to start to be available after the 4-th evolution. The derivations of the analytic formulas for the characteristic points in the phase diagrams are also presented.

• 社団法人　日本磁気学会の論文

著者

• Fujiwara Hideo

  MINT Center and Department of Physics and Astronomy, The University of Alabama

関連論文

• Phase Diagrams and Magnetization Field-Responses of Synthetic Antiferromagnets

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