Mn1. 35Fe0. 65P0. 45Si0. 55Bx合金的磁热效应

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摘要对Mn1. 35Fe0. 65P0. 45Si0. 55Bx（x=0,0. 01,0. 02,0. 03,0. 04）合金的结构和磁热效应（MCE）进行了研究。XRD分析结果表明：Mn1. 35Fe0. 65P0. 45Si0. 55Bx（x=0,0. 01,0. 02,0. 03,0. 04）的合金均为Fe2P型六角结构，空间群为P6-2m，并随着B元素（原子分数）的增加，晶格常数a增大，c/a减小，晶胞体积V略有减小。磁性测量表明：随着B元素（原子分数）的增加，Curie温度（Tc）从228 K升高到315 K，热滞(ΔThys)变化不大。0~1. 5 T外磁场下最大磁熵变（－ΔSmaxM）下降，分别为3. 6 ,2. 5,2. 0,1. 7,1. 9 J/(kg·K)。

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	松林

关键词 ：磁热效应, 热滞, 相变, 居里温度, 磁熵变

Abstract：Structure and magnetocaloric effect（MCE）of the Mn1. 35Fe0. 65P0. 45Si0. 55Bx（x= 0, 0. 01, 0. 02, 0. 03 and 0. 04, atomic fraction）alloys have been investigated. XRD result shows that the Mn1. 35Fe0. 65P0. 45Si0. 55Bx（x= 0, 0. 01, 0. 02, 0. 03 and 0. 04）alloys mainly consist of the Fe2P-type hexagonal structure phase with space group P6-2 m. With increasing x lattice parameter a increases while lattice parameter c decreases, unit cell volume V decreases slightly. The magnetic measurements show that the Curie temperature increases from 228 to 315 K, while the thermal hysteresis has little change. The maximum magnetic entropy change, in a magnetic field change of 0-1. 5 T, decrease slightly with increasing boron content and their values are 3. 6, 2. 5, 2. 0, 1. 7 and 1. 9 J/(kg·K), respectively.

Key words： magnetocaloric effect thermal hysteresis phase transition Curie temperature magnetic entropy

收稿日期: 2013-12-16 出版日期: 2014-03-11

基金资助:国家自然科学基金资助

通讯作者: 松林 E-mail: songlin@imnu.edu.cn

引用本文:

阿日木申，松林，吴文彬，宋志强，徐萌，特古斯. Mn1. 35Fe0. 65P0. 45Si0. 55Bx合金的磁热效应[J]. , 2014, 21(1): 5-8.
A Ri Mu Shen,SONG Lin, WU Wen-bin, SONG Zhi-qiang, XU Meng, Tegusi O. Magnetocaloric Effect of Mn1. 35Fe0. 65P0. 45Si0. 55BxAlloys. , 2014, 21(1): 5-8.

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