中国物理B ›› 2016, Vol. 25 ›› Issue (2): 27501-027501.doi: 10.1088/1674-1056/25/2/027501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Magnetic entropy change and magnetic properties of LaFe11.5Si1.5 after controlling the Curie temperature by partial substitution of Mn and hydrogenation

Bin Fu(傅斌) and Jie Han(韩洁)   

  1. 1. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;
    2. College of Science, Tianjin University of Technology, Tianjin 300384, China
  • 收稿日期:2015-08-22 修回日期:2015-09-26 出版日期:2016-02-05 发布日期:2016-02-05
  • 通讯作者: Bin Fu E-mail:fubin80@126.com
  • 基金资助:

    Projct supported by the Science and Technology Development Fund of Higher Education of Tianjin, China (Grant No. 20130301) and the Tianjin Research Program of Application Foundation and Advanced Technology, China (Grant No. 14JCQNJC4000).

Magnetic entropy change and magnetic properties of LaFe11.5Si1.5 after controlling the Curie temperature by partial substitution of Mn and hydrogenation

Bin Fu(傅斌)1 and Jie Han(韩洁)2   

  1. 1. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;
    2. College of Science, Tianjin University of Technology, Tianjin 300384, China
  • Received:2015-08-22 Revised:2015-09-26 Online:2016-02-05 Published:2016-02-05
  • Contact: Bin Fu E-mail:fubin80@126.com
  • Supported by:

    Projct supported by the Science and Technology Development Fund of Higher Education of Tianjin, China (Grant No. 20130301) and the Tianjin Research Program of Application Foundation and Advanced Technology, China (Grant No. 14JCQNJC4000).

摘要:

Magnetic properties and magnetic entropy changes of La(Fe1-xMnx)11.5Si1.5Hy compounds are investigated. Their Curie temperatures are adjusted to room temperature by partial Mn substitution for Fe and hydrogen absorption in 1-atm (1 atm=1.01325×105 Pa) hydrogen gas. Under a field change from 0 T to 2 T, the maximum magnetic entropy change for La(Fe0.99Mn0.01)11.5Si1.5H1.61 is -11.5 J/kg. The suitable Curie temperature and large value of Δ Sm make it an attractive potential candidate for the room temperature magnetic refrigeration application.

关键词: magnetic refrigeration, Curie temperature (TC), hydrogen absorption, magnetocaloric effect (MCE)

Abstract:

Magnetic properties and magnetic entropy changes of La(Fe1-xMnx)11.5Si1.5Hy compounds are investigated. Their Curie temperatures are adjusted to room temperature by partial Mn substitution for Fe and hydrogen absorption in 1-atm (1 atm=1.01325×105 Pa) hydrogen gas. Under a field change from 0 T to 2 T, the maximum magnetic entropy change for La(Fe0.99Mn0.01)11.5Si1.5H1.61 is -11.5 J/kg. The suitable Curie temperature and large value of Δ Sm make it an attractive potential candidate for the room temperature magnetic refrigeration application.

Key words: magnetic refrigeration, Curie temperature (TC), hydrogen absorption, magnetocaloric effect (MCE)

中图分类号:  (Magnetocaloric effect, magnetic cooling)

  • 75.30.Sg
75.50.-y (Studies of specific magnetic materials)