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

doi:10.1088/1674-1056/25/2/027501

Abstract

Magnetic properties and magnetic entropy changes of La(Fe_1-xMn_x)_11.5Si_1.5H_y 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(Fe_0.99Mn_0.01)_11.5Si_1.5H_1.61 is -11.5 J/kg. The suitable Curie temperature and large value of Δ S_m make it an attractive potential candidate for the room temperature magnetic refrigeration application.

Keywords: magnetic refrigeration Curie temperature (T_C) hydrogen absorption magnetocaloric effect (MCE)

Received: 22 August 2015
Revised: 26 September 2015
Accepted manuscript online:

PACS:	75.30.Sg	(Magnetocaloric effect, magnetic cooling)
	75.50.-y	(Studies of specific magnetic materials)

Fund:

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).

Corresponding Authors: Bin Fu
E-mail: fubin80@126.com

Cite this article:

Bin Fu(傅斌) and Jie Han(韩洁) Magnetic entropy change and magnetic properties of LaFe_11.5Si_1.5 after controlling the Curie temperature by partial substitution of Mn and hydrogenation 2016 Chin. Phys. B 25 027501

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

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Magnetic entropy change and magnetic properties of LaFe_11.5Si_1.5 after controlling the Curie temperature by partial substitution of Mn and hydrogenation