| 高性能纳米复合永磁材料的模拟计算研究 |
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| 引用本文： | 张宏伟,荣传兵,张绍英,沈保根.高性能纳米复合永磁材料的模拟计算研究[J].物理学报,2004,53(12):4347-4352. |
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| 作者姓名： | 张宏伟 荣传兵 张绍英 沈保根 |
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| 作者单位： | 中国科学院物理研究所磁学国家重点实验室，北京 100080 |
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| 基金项目： | 国家自然科学基金(批准号：10274102)资助的课题. |
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| 摘 要： | 构造了在软磁相基体中析出规则形状硬磁相的各向同性和各向异性纳米复合永磁材料Pr2Fe14Bα-Fe.利用微磁学的有限元法，模拟计算了样品的磁滞回线.通过对剩磁、矫顽力和最大磁能积与软磁相厚度的关系分析，发现在软磁相厚度为0—12nm的范围内，复合磁体的矫顽力随软磁相厚度的增加而单调下降，而最大磁能积则是在适当的矫顽力和剩磁下达到最高.预计纳米复合Pr2(Fe,Co)14Bα-(Fe,Co)的各向同性磁体的最大磁能积最高可达248kJ/m3，而各向异性磁体则高达784kJ/m3.
关键词：
纳米复合永磁
矫顽力
剩磁
磁能积
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| 关 键 词： | 纳米复合永磁 矫顽力 剩磁 磁能积 |
| 收稿时间： | 2004-05-31 |
| 修稿时间： | 7/5/2004 12:00:00 AM |
Investigation of high-performance hard magnetic properties of nanocomposite permanent magnets by micromagnetic finite element method |
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| Zhang Hong-Wei,Rong Chuan-Bing,Zhang Shao-Ying,Shen Bao-Gen.Investigation of high-performance hard magnetic properties of nanocomposite permanent magnets by micromagnetic finite element method[J].Acta Physica Sinica,2004,53(12):4347-4352. |
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| Authors: | Zhang Hong-Wei Rong Chuan-Bing Zhang Shao-Ying Shen Bao-Gen |
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| Abstract: | The microstructure with which a hard magnetic phase precipitates from the soft magne ticmatrix, is observed in nanocomposite Pr2Fe14B-αFe. The magnetic hysteresis loo ps are simulated by micromagnetic finite element method. The dependence of reman ence, coercivity and maximum energy product on the width of soft phase are discu ssed in detail. Although a single hard magnetic phase behavior is observed, the coercivity decreases monotonically with the increase of soft phase width from 0 to 12 nm. The obtained maximum energy products are 184 and 674 kJ/m3 for isotropic and anisotropic magnets, respectively. |
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| Keywords: | nanocomposite permanent magnet coercivity remanence energy product |
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