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.
Received: 24 September 2003
Revised: 11 November 2003
Accepted manuscript online:
PACS:
75.30.Kz
(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
(Critical-point effects, specific heats, short-range order)
Fund: 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 (
Cite this article:
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 2004 Chinese Physics 13 546
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