Magnetic properties and microstructures of nanocomposite

YIN Shilong BIAN Qing ZHANG Jing XIE Guozhi WANG Hongbing WEI Shiqiang

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Magnetic properties and microstructures of nanocomposite

更新时间：2021-03-12

- Magnetic properties and microstructures of nanocomposite
- NUCLEAR TECHNIQUES Issue 11, (2003)
- 作者机构：
  
  1. 河海大学理学院
  2. 解放军理工大学理学院
  3. 中国科学院高能物理研究所
  4. 河海大学土木院
  5. 中国科学技术大学国家同步辐射实验室,南京,210098
  6. ,合肥,230029
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM274
- Published：01 November 2003
- 稿件说明：
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[1]殷士龙,卞清,张静,谢国治,王红兵,韦世强.纳米复合永磁合金Nd_9Fe_(85-x)Mn_xB_6的结构和磁性[J].核技术,2003(11):813-816.

YIN Shilong BIAN Qing ZHANG Jing XIE Guozhi WANG Hongbing WEI Shiqiang. Magnetic properties and microstructures of nanocomposite[J]. Nuclear techniques, 2003, (11): 813-816.
[1]殷士龙,卞清,张静,谢国治,王红兵,韦世强.纳米复合永磁合金Nd_9Fe_(85-x)Mn_xB_6的结构和磁性[J].核技术,2003(11):813-816. DOI：

YIN Shilong BIAN Qing ZHANG Jing XIE Guozhi WANG Hongbing WEI Shiqiang. Magnetic properties and microstructures of nanocomposite[J]. Nuclear techniques, 2003, (11): 813-816. DOI：

摘要

利用X射线衍射（XRD）和X射线吸收精细结构（XAFS）技术对淬火速度为20 m/s的退火和未退火Nd9Fe85-xMnxB6（x=0

0.5和1.0）样品分别进行了晶体结构和Fe原子局域环境的分析

并用振动样品磁强计分析了样品的磁性。结果表明:退火前

掺杂微量Mn原子对纳米复合Nd-Fe-B磁性材料的晶体结构和近邻配位无序度都有显著影响

随着Mn含量的增加

Nd2Fe14B硬磁相和α-Fe软磁相的结晶度明显增加;在温度为973 K、5min退火后

Nd9Fe85-xMnxB6（x=0

0.5和1.0）磁体的主相结构基本相同

但矫顽力由339 kA/m增加到398 kA/m

我们认为这是由于掺杂的Mn原子影响Nd2Fe14B和α-Fe颗粒晶界的交换耦合作用所致。

Abstract

The structures and magnetic properties of the as-spun and annealed Nd9Fe85-xMnxB6 (x=0

0.5

1.0) nano-composite magnetic materials were investigated by XRD

XAFS and vibrating sample magnetometer (VSM). The XRD and XAFS results indicated that the structures of the as-spun Nd-Fe-B nano-composites were largely correlated by the addition of element Mn. With increasing the amount of element Mn

the long-range order of both soft magnetic phase a-Fe and hard magnetic phase Nd2Fe14B largely increased. After annealed at the optimal temperature of 973 K for 5 min

the results implied that the long-range and local structures of the Nd9Fe85B6 were almost the same as those of Nd9Fe84 5Mn0.5B6 and Nd9Fe84Mn1B6. However

the VSM results showed that the coercivity was obviously enhanced from 339 to 398 kA/m for the annealed Nd9Fe85-xMnxB6 nano-composites with the x from 0 to 1. These results were supposed to arise from the exchange coupling between the Nd2Fe14B and α-Fe grains induced by the addition of element Mn.

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