National Changhua University of Education Institutional Repository : Item 987654321/15447
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題名: Exchange Bias in NiFe/IrMn/CoFeB Antidot Arrays
作者: Huang, Chao-Hsien;Lo, Sheng-Yu;Wu, Tian-Chiuan;Wu, Jong-Ching;Horng, Lance
貢獻者: 物理學系
關鍵詞: Coercive force;Exchange interactions;Ferromagnetic materials;Magnetic hysteresis
日期: 2011-10
上傳時間: 2013-02-05T02:20:44Z
出版者: IEEE
摘要: A study was made of the exchange bias effect in a structure of SiO2/Ta (5 nm)/NiFe (7 nm)/IrMn (10 nm)/CoFeB (7 nm)/Ta (5 nm) with nanoscale antidot arrays. The nanostructure comprised rhomboid lattice antidot arrays with antidot diameters from 150 to 300 nm and a rhomboid lattice period of 500 nm. Enhancements of exchange bias HEX and coercivity HC were observed in the nanostructure antidot arrays compared to continuous film. These effects were mainly ascribed to the physical limitations on ferromagnetic and antiferromagnetic layers due to the presence of antidots. In antidot arrays, due to the presence of nonmagnetic holes, the ferromagnetic-ferromagnetic interactions in FM layer are reduced, leading to smaller ferromagnetic domains and larger exchange bias with the random-field model. In this paper, the relation between the antidot diameter size and exchange bias was studied.
關聯: IEEE Trans. on Magnetics, 47(10): 3494-3496
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