Monte Carlo modeling of magnetic properties in magnetic granular films for high-density recording (マルチメディアストレージ 第6回アジア情報記録技術シンポジウム〔英文〕)
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概要
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In this paper, magnetic properties of Co-C and CoPt-C nanogranular films are modeled using the Monte Carlo method. Each grain in the films is assumed to be spherical in shape, with a single domain and a random crystalline easy axis in the model. For Co-C films, the hysteresis loop for hexagonal close-packed(hcp)Co grains of 3 nm in size is calculated at various temperatures ranging from 3 K to 300 K. The superparamagnetic relaxation blocking temperature(T_B)is demonstrated to be about 20 K. For CoPt-C films, hysteresis magnetization calculations are performed on face-central-tetragonal(fct)CoPt inter-metal compound grains encapsulated in carbon with various grain sizes ranging from 4 nm to 6 nm and different distributions. Extremely high coercivities required by ultra-high density magnetic recording are achieved in these films owing to the very large anisotropy of fct CoPt compound. The numerical results are compared with our experimental data of Co-C granular films and those of CoPt-C granular films recently reported in the literatures.
- 社団法人映像情報メディア学会の論文
- 2001-11-07
著者
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Wong S.p.
Department Of Electronic Engineering And Materials Science And Technology Research Center The Chines
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WANG H.
Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University
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HU L.
Institute of Geography Science, Xinjiang Normal University
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Li Wei
Institute Of Thin Films And Nanomaterials Department Of Mathematics And Physics Wuyi University
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Chiah M.F.
Department of Electronic Enginneering The Chinese University of Hong Kong
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Chiah M.f.
Department Of Electronic Engineering And Materials Science And Technology Research Center The Chines
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Wang H.
Department Of Electronic Engineering And Materials Science And Technology Research Center The Chines
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Zhou G.R.
Institute of Thin Films and Nanomaterials, Department of Mathematics and Physics, Wuyi University
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Wu S.
Institute of Thin Films and Nanomaterials, Department of Mathematics and Physics, Wuyi University
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Poon C.Y.
Department of Electronic Engineering and Materials Science and Technology Research Center, The Chine
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Poon C.y
Department Of Electronic Engineering And Materials Science And Technology Research Center The Chines
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Zhou G.r.
Institute Of Thin Films And Nanomaterials Department Of Mathematics And Physics Wuyi University
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Wang Hao
Institute Of Automobile Engineering Shanghai Jiao Tong University
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Poon C.
Department Of Electronic Engineering & Materials Science And Technology Research Centre The Chin
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Wang H.
Institute Of Aeronautics And Astronautics National Cheng Kung University
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Li Wei
Institute Of Plant Protection Jiangsu Academy Of Agricultural Sciences
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Hu Lin
Institute of Thin Films and Nanomaterials, Department of Mathematics and Physics, Wuyi University
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LI Wei
Institute of Automatic Control Engineering. Technische Universitat Munchen
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