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

• 来源期刊: 中国物理（英文版）
• 关键词: Fe-Fe bond length magnetic phase transition magnetic entropy change
• 年，卷（期）: 2004,（4）
• 页码范围: 546-551
• 页数: 6页
• 语种: 英文

摘要

In this paper the effects of Fe-Fe bond length change on magnetic properties and magnetic entropy change have been investigated on LaFe12.4-xSixCo0.6 and LaFe12.3-xAlxCo0.7 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 LaFe12.4-xSixCo0.6 compounds were also studied and the considerable magnetic entropy change has been achieved.