Magnetic properties and magnetocaloric effect of Nd(Mn(1-x)Fe(x))(2)Ge(2) compounds

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	Magnetic properties and magnetocaloric effect of Nd(Mn(1-x)Fe(x))(2)Ge(2) compounds
	Y. Q. Chen; J. Luo; J. K. Liang; J. B. Li; G. H. Rao
	2010
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	489 期号:1 页码:13-19
摘要	Polycrystalline Nd(Mn(1-x)Fe(x))(2)Ge(2) (0 <= x <= 1) compounds have been prepared by arc-melting. X-ray powder diffraction analysis shows that all samples crystallize in the ThCr(2)Si(2)-type structure with the space group 14/mmm. The substitution of Fe for Mn results in decreases of the lattice constants a, c and the unit-cell volume V. Magnetic properties and magnetocaloric effect of the compounds Nd(Mn(0.9)Fe(0.1))(2)Ge(2) and Nd(Mn(0.8)Fe(0.2))(2)Ge(2) have been studied by magnetic measurements. A spin reorientation transition at about 188 K is observed for Nd(Mn(0.9)Fe(0.1))(2)Ge(2). The Nd(Mn(0.8)Fe(0.2))(2)Ge(2) compound shows more complicated magnetic behavior, which is characterized by four magnetic ordering states below room temperature. The maximum values of the magnetic entropy change are 2.35 and 1.84 J kg(-1) K(-1) for x = 0.1 and 0.2, respectively, under the applied field changing from 0 to 5T. The relative cooling powers of Nd(Mn(0.9)Fe(0.1))(2)Ge(2) and Nd(Mn(0.8)Fe(0.2))(2)Ge(2) are 145.9 and 133.8 J kg(-1) under an applied field change of 5T. (C) 2009 Elsevier B.V. All rights reserved.
部门归属	[chen, y. q.; luo, j.; liang, j. k.; li, j. b.; rao, g. h.] chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100190, peoples r china. [liang, j. k.] acad sinica, int ctr mat phys, shenyang 110016, peoples r china.;luo, j (reprint author), chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100190, peoples r china;jluo@aphy.iphy.ac.cn
关键词	Metals And Alloys Magnetocaloric X-ray Diffraction Room-temperature Applications Neutron-diffraction Phase-transitions Crystal-structure Solid-solution Refrigeration Silicides Mn 0-less-than-or-equal-to-x-less-than-or-equal-to-1 Mnas1-xsbx
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31038
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Q. Chen,J. Luo,J. K. Liang,et al. Magnetic properties and magnetocaloric effect of Nd(Mn(1-x)Fe(x))(2)Ge(2) compounds[J]. Journal of Alloys and Compounds,2010,489(1):13-19.
APA	Y. Q. Chen,J. Luo,J. K. Liang,J. B. Li,&G. H. Rao.(2010).Magnetic properties and magnetocaloric effect of Nd(Mn(1-x)Fe(x))(2)Ge(2) compounds.Journal of Alloys and Compounds,489(1),13-19.
MLA	Y. Q. Chen,et al."Magnetic properties and magnetocaloric effect of Nd(Mn(1-x)Fe(x))(2)Ge(2) compounds".Journal of Alloys and Compounds 489.1(2010):13-19.