| Simulation of magnetization behaviours of Sm（Co,Fe,Cu,Zr）z magnet with low Cu content |
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| 引用本文： | 陈仁杰,张宏伟,沈保根,闫阿儒,陈立东. Simulation of magnetization behaviours of Sm（Co,Fe,Cu,Zr）z magnet with low Cu content[J]. 中国物理 B, 2009, 18(6): 2582-2588. DOI: 10.1088/1674-1056/18/6/077 |
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| 作者姓名： | 陈仁杰 张宏伟 沈保根 闫阿儒 陈立东 |
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| 作者单位： | Ningbo Institute of Materials Technology { &Engineering, ChineseAcademy of Sciences, Ningbo 315201, China;Shanghai Institute of Ceramics, Chinese Academy ofSciences, Shanghai 200050, China;State Key Laboratory of Magnetism, Institute of Physicsand Center for Condensed Matter Physics, Chinese Academy ofSciences, Beijing 100190,China;State Key Laboratory of Magnetism, Institute of Physicsand Center for Condensed Matter Physics, Chinese Academy ofSciences, Beijing 100190,China;Ningbo Institute of Materials Technology { &Engineering, ChineseAcademy of Sciences, Ningbo 315201, China;Shanghai Institute of Ceramics, Chinese Academy ofSciences, Shanghai 200050, China |
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| 基金项目： | Project supported by the NaturalScience Foundation of Zhejiang Province, China (Grant No Y407174). |
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| 摘 要： | The effects of microstructure, cell orientation and temperature onmagnetic properties and the coercivity mechanism in Sm(Co,Fe,Cu,Zr)zwith low Cu content are studied by using the micromagnetic finiteelement method in this paper. The simulations of the demagnetizationbehaviours indicate that the pinning effect weakens gradually withthe thickness of cell boundary decreasing and strengthens graduallywith the cell size decreasing. Because of the intergrain exchangecoupling, the coercivity mechanism is determined by the differencein magnetocrystalline anisotropy between the cell phase and the cellboundary phase. And the coercivity mechanism is related to not onlythe cells alignment but also temperature. With temperatureincreasing, a transformation of the demagnetization mechanism occursfrom the domain pinning to the uniform magnetization reversal modeand the transformation temperature is about 650~K.
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| 关 键 词： | micromagnetic finite elementmethod microstructure cell orientation temperature |
| 收稿时间： | 2008-09-17 |
Simulation of magnetization behaviours of Sm(Co,Fe,Cu,Zr)z magnet with low Cu content |
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| Chen Ren-Jie,Zhang Hong-Wei,Shen Bao-Gen,Yan A-Ru and Chen Li-Dong. Simulation of magnetization behaviours of Sm(Co,Fe,Cu,Zr)z magnet with low Cu content[J]. Chinese Physics B, 2009, 18(6): 2582-2588. DOI: 10.1088/1674-1056/18/6/077 |
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| Authors: | Chen Ren-Jie Zhang Hong-Wei Shen Bao-Gen Yan A-Ru Chen Li-Dong |
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| Affiliation: | Ningbo Institute of Materials Technology { & Engineering, Chinese Academy of Sciences, Ningbo 315201, China; State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China; Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
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| Abstract: | The effects of microstructure, cell orientation and temperature onmagnetic properties and the coercivity mechanism in Sm(Co,Fe,Cu,Zr)zwith low Cu content are studied by using the micromagnetic finiteelement method in this paper. The simulations of the demagnetizationbehaviours indicate that the pinning effect weakens gradually withthe thickness of cell boundary decreasing and strengthens graduallywith the cell size decreasing. Because of the intergrain exchangecoupling, the coercivity mechanism is determined by the differencein magnetocrystalline anisotropy between the cell phase and the cellboundary phase. And the coercivity mechanism is related to not onlythe cells alignment but also temperature. With temperatureincreasing, a transformation of the demagnetization mechanism occursfrom the domain pinning to the uniform magnetization reversal modeand the transformation temperature is about 650~K. |
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| Keywords: | micromagnetic finite elementmethod microstructure cell orientation temperature |
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