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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.6
- 수록면
- 83 - 87 (5page)
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초록· 키워드
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The vortex-driven magnetization process of micron-sized, exchange-coupled square elements with composition of Ni??Fe₂? (12 ㎚)/Ir₂?Mn?? (5 ㎚) is investigated. The exchange-bias is introduced by field-cooling through the blocking temperature (TB) of the system, whereby Landau-shaped vortex states of the Ni??Fe₂? layer are imprinted into the Ir₂?Mn??. In the case of zero-field cooling, the exchange-coupling at the ferromagnetic/antiferromagnetic interface significantly enhances the vortex stability by increasing the nucleation and annihilation fields, while reducing coercivity and remanence. For the field-cooled elements, the hysteresis loops are shifted along the cooling field axis. The loop shift is attributed to the imprinting of displaced vortex state of Ni??Fe₂? into Ir₂?Mn??, which leads to asymmetric effective local pinning fields at the interface. The asymmetry of the hysteresis loop and the strength of the exchange-bias field can be tuned by varying the strength of cooling field. Micromagnetic modeling reproduces the experimentally observed vortex-driven magnetization process if the local pinning fields induced by exchange-coupling of the ferromagnetic and antiferromagnetic layers are taken into account.
목차
1. Introduction
2. Experimental Details
3. Results and Discussion
4. Conclusions
Acknowledgements
References
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UCI(KEPA) : I410-ECN-0101-2013-428-000554137