Magnetovolume effect in Ho2Fe17-xMnx compounds

被引：13

作者：

Wang, J. L. ^{[1
,2
,3
]}

Studer, A. J. ^{[2
]}

Kennedy, S. J. ^{[2
]}

Zeng, R. ^{[1
]}

Dou, S. X. ^{[1
]}

Campbell, S. J. ^{[3
]}

机构：

[1] Univ Wollongong, Inst Superconduct & Elect Mat, Wollongong, NSW 2522, Australia

[2] ANSTO, Bragg Inst, Menai, NSW 2234, Australia

[3] Univ New S Wales, Sch Phys Environm & Math Sci, Canberra, ACT 2600, Australia

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 07期

关键词：

MAGNETIC-PROPERTIES; R2FE17; R;

D O I：

10.1063/1.3671422

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structural and magnetic properties of seven compounds in the Ho2Fe17-xMnx series (x = 0-5) have been investigated. The spontaneous magnetization M-s at 10 K exhibits a minimum at x approximate to 3.8 while the 3d-sublattice magnetization M-T is found to decrease at similar to -3.4 mu(B)/per Mn atom compared with the rate of similar to -2.0 mu(B)/per Mn atom expected from a simple dilution model. All of the Ho2Fe17-xMnx compounds exhibit anisotropic thermal expansion below their Curie temperatures leading to the presence of strong magnetovolume effects and Invar-type behavior below T-C. An approximately zero volume thermal expansion has been detected between 10 K and 270 K for Ho2Fe17. The maximum magnetic entropy changes for Ho2Fe17-xMnx with x = 0 and 2.0 are 3.2 J kg(-1) K-1 around T-C similar to 336 K and 2.7 J kg(-1) K-1 around T-C similar to 302 K, respectively, for magnetic field change of B = 0-5 T. (C) 2012 American Institute of Physics. [doi:10.1063/1.3671422]

引用

页数：3

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