| Ga替代对纳米晶Nd(Fe,Co)B黏结磁体磁性能的影响 |
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| 引用本文： | 朱明刚,李卫,董生智,李岫梅.Ga替代对纳米晶Nd(Fe,Co)B黏结磁体磁性能的影响[J].物理学报,2001,50(8):1600-1604. |
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| 作者姓名： | 朱明刚 李卫 董生智 李岫梅 |
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| 作者单位： | (1)钢铁研究总院功能材料研究所,北京100081; (2)钢铁研究总院功能材料研究所,北京100081;河北师范大学物理系,石家庄050016 |
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| 基金项目： | 国家自然科学基金(批准号:50071051和59901010)资助的课题. |
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| 摘 要： | 探讨了微量的Ga替代Fe对Nd2(Fe,Co)14B/(Fe,Co)3B+(少量)α-Fe永磁材料的晶体结构及磁性能的影响,并讨论了双相纳米晶磁体性能的变化机理以及所适用的理论模型.结果表明,Ga的添加不仅使晶粒尺寸显著变小,而且在Ga含量x<1at%的范围,随着x的增加,Br和(BH)max随退火时间的变化关系由形似马鞍的曲线转化为抛物曲线;矫顽力jHc先下降到一个最小值后再上升;当x=0.2时,综合磁性能较好
关键词：
双相纳米晶磁体
快淬
退火
交换耦合
磁性能
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| 关 键 词： | 双相纳米晶磁体 快淬 退火 交换耦合 磁性能 |
| 收稿时间： | 2000-11-08 |
| 修稿时间： | 2000年11月8日 |
THE EFFECT ON THE MAGNETIC PROPERTIES OF THE DUAL-PHASE NANOCRYSTALLINE Nd(Fe,Co)B BONDED MAGNETS BY ADDING Ga |
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| ZHU MING-GANG,LI WEI,DONG SHENG-ZHI and LI XIU-MEI.THE EFFECT ON THE MAGNETIC PROPERTIES OF THE DUAL-PHASE NANOCRYSTALLINE Nd(Fe,Co)B BONDED MAGNETS BY ADDING Ga[J].Acta Physica Sinica,2001,50(8):1600-1604. |
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| Authors: | ZHU MING-GANG LI WEI DONG SHENG-ZHI and LI XIU-MEI |
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| Abstract: | Effect of the Ga content substituting the Fe on the crystal structure and magnetic properties of the Nd2(Fe,Co)14B/(Fe,Co)3B+(little)α-Fe permanent magnetic materials is studied. The change mechanism of magnetic properties of the dual-phase nanocrystalline magnets is discussed.The results show that the crystal size was markedly decreased by adding Ga. With the increase of x, the dependence of the Br and the (BH)max on annealing time undergoes a chang from two-peak curves to one-peak curves in the Ga content range of x<1at%. The coercive forcej Hc decreases at first to a minimum and then increases slowly. The best value of the magnetic properties is obtained at x=0.2. |
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| Keywords: | dual-phase nanocrystalline magnets metl-spin annealing exchange coupling magnetic properties |
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