Effects of Fe－Fe bond length change in NaZn13-type intermetallic compounds on magnetic properties and magnetic entropy change

doi:10.1088/1009-1963/13/4/024

中国物理B ›› 2004, Vol. 13 ›› Issue (4): 546-551.doi: 10.1088/1009-1963/13/4/024

Effects of Fe－Fe bond length change in NaZn₁₃-type intermetallic compounds on magnetic properties and magnetic entropy change

王光军, 胡凤霞, 王芳, 沈保根

State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China

收稿日期:2003-09-24 修回日期:2003-11-11 出版日期:2004-04-22 发布日期:2004-04-20
基金资助:
Project supported by the State Key Development Programme of Basic Research of China (Grant No G 1998061303), by the National High Technology Development Programme of China (Grant No 2002A A324010), and by the National Natural Science Foundation of China (

Effects of Fe－Fe bond length change in NaZn₁₃-type intermetallic compounds on magnetic properties and magnetic entropy change

Wang Guang-Jun (王光军), Hu Feng-Xia (胡凤霞), Wang Fang (王芳), Shen Bao-Gen (沈保根)

State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China

Received:2003-09-24 Revised:2003-11-11 Online:2004-04-22 Published:2004-04-20
Supported by:
Project supported by the State Key Development Programme of Basic Research of China (Grant No G 1998061303), by the National High Technology Development Programme of China (Grant No 2002A A324010), and by the National Natural Science Foundation of China (

摘要/Abstract

摘要： In this paper the effects of Fe－Fe bond length change on magnetic properties and magnetic entropy change have been investigated on LaFe_{12.4-x}Si_xCo_{0.6} and LaFe_{12.3-x}Al_xCo_{0.7} intermetallic compounds. According to the analyses of Fe－Fe bond length change, the variation of Curie temperature and the unusual magnetic phase transition which results in the large magnetic entropy change were explained. The effects of the substitution of Co and Si for Fe on magnetic entropy change and field-induced itinerant-electron metamagnetic transition in LaFe_{12.4-x}Si_xCo_{0.6} compounds were also studied and the considerable magnetic entropy change has been achieved.

关键词: Fe－Fe bond length, magnetic phase transition, magnetic entropy change

Abstract: In this paper the effects of Fe－Fe bond length change on magnetic properties and magnetic entropy change have been investigated on LaFe$_{12.4-x}$Si$_x$Co$_{0.6}$ and LaFe$_{12.3-x}$Al$_x$Co$_{0.7}$ intermetallic compounds. According to the analyses of Fe－Fe bond length change, the variation of Curie temperature and the unusual magnetic phase transition which results in the large magnetic entropy change were explained. The effects of the substitution of Co and Si for Fe on magnetic entropy change and field-induced itinerant-electron metamagnetic transition in LaFe$_{12.4-x}$Si$_x$Co$_{0.6}$ compounds were also studied and the considerable magnetic entropy change has been achieved.

Key words: Fe－Fe bond length, magnetic phase transition, magnetic entropy change

中图分类号: (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

75.30.Kz

75.50.Bb (Fe and its alloys) 75.10.Lp (Band and itinerant models) 75.40.-s (Critical-point effects, specific heats, short-range order)

王光军, 胡凤霞, 王芳, 沈保根. Effects of Fe－Fe bond length change in NaZn₁₃-type intermetallic compounds on magnetic properties and magnetic entropy change[J]. 中国物理B, 2004, 13(4): 546-551.

Wang Guang-Jun (王光军), Hu Feng-Xia (胡凤霞), Wang Fang (王芳), Shen Bao-Gen (沈保根). Effects of Fe－Fe bond length change in NaZn₁₃-type intermetallic compounds on magnetic properties and magnetic entropy change[J]. Chinese Physics, 2004, 13(4): 546-551.

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Effects of Fe－Fe bond length change in NaZn₁₃-type intermetallic compounds on magnetic properties and magnetic entropy change

Effects of Fe－Fe bond length change in NaZn₁₃-type intermetallic compounds on magnetic properties and magnetic entropy change

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