快淬Nd9Fe85-x MnxB6(x=0、0.5、1)磁性能研究

功能材料, 2002, 33(6): 615-617.

快淬Nd9Fe85-x MnxB6(x=0、0.5、1)磁性能研究

谢国治 ^1, , 田宗军 ^2, , 余智 ^3, , 顾本喜 ^4, , 鹿牧 ^5, , 都有为 ^6,

1.南京大学物理系,固体微结构国家重点实验室,江苏,南京,210093

2.南京大学物理系,固体微结构国家重点实验室,江苏,南京,210093

3.南京大学物理系,固体微结构国家重点实验室,江苏,南京,210093

4.南京大学物理系,固体微结构国家重点实验室,江苏,南京,210093

5.南京大学物理系,固体微结构国家重点实验室,江苏,南京,210093

6.南京大学物理系,固体微结构国家重点实验室,江苏,南京,210093

基金项目: 国家重点基础研究发展计划(973计划)(G1999064508)

关键词：纳米复合材料 , 矫顽力 , 交换耦合

Reasearch on the magnetic properties of melt-spun Nd9 Fe85-xMnxB6 (x=0、0.5、1)

应用DTA、XRD、Mossbauer谱和VSM对快淬Nd9Fe85-x MnxB6(x=0、0.5、1)纳米复合材料磁性能进行了研究.发现少量Mn的掺杂能够显著促进快淬样品的晶化并提高快淬样品的永磁性能,在合适的热处理条件下,得到的最佳矫顽力和剩磁比分别从339.5kA/m和0.70提高到398.1kA/m和0.72,最大磁能积(BH)max从83.6kJ/m3提高到87.5kJ/m3,而剩磁没有明显的下降.TMA显示Mn掺杂降低Nd2Fe14B相的居里温度并提高α-Fe相的居里温度.认为永磁性能的提高是由于Mn进入两相的晶格.

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