First-order magnetic transition, magnetocaloric effect and moment formation in MnFe(P,Ge) magnetocaloric materials revisited by x-ray magnetic circular dichroism

doi:10.1016/j.physb.2018.05.002

IMR OpenIR

	First-order magnetic transition, magnetocaloric effect and moment formation in MnFe(P,Ge) magnetocaloric materials revisited by x-ray magnetic circular dichroism
	Wurentuya, B.1,2,3; Yibole, H.3; Guillou, F.3; Ou, Zhiqiang 3; Zhang, Zhidong 1,2; Tegus, O.3
通讯作者	Tegus, O.(tegusph@imnu.edu.cn)
	2018-09-01
发表期刊	PHYSICA B-CONDENSED MATTER
ISSN	0921-4526
卷号	544 页码:66-72
摘要	Fe2P-based materials are attracting great interest for their giant magnetocaloric effect making them highly promising candidates for a new energy efficient-magnetic cooling technology. In light of recent results reported in the MnFe(P,Si) and MnFe(P,Si,B) series, here we revisit the effect of Ge substitution for P. By fixing the Mn/Fe ratio to unity while exploring a large range of Ge content, we isolate the effect Ge plays as metalloid element. In contrast to other metalloids (like Si, B or As), Ge substitution for P is found to spectacularly increase the Curie temperature, while preserving the first-order character of the transition. As a consequence, Ge substitution for P provides a mean to achieve giant magnetocaloric performances up to high temperatures (at least 465 K). In addition, the moment formation in MnFe(P,Ge) is investigated using an element specific and orbital selective magnetization probe, x-ray magnetic circular dichroism. The magnetic moments carried by Mn atoms are found to be significantly larger than that of Fe, providing a direct experimental support to reported band structure calculations and neutron diffraction experiments.
关键词	Magnetocaloric effect Magnetic phase transition XMCD
资助者	National Natural Science Foundation of China
DOI	10.1016/j.physb.2018.05.002
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51161017] ; National Natural Science Foundation of China[51531008]
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:000434382300010
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/128350
专题	中国科学院金属研究所
通讯作者	Tegus, O.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 3.Inner Mongolia Normal Univ, Coll Phys & Elect Informat, Hohhot 010022, Peoples R China
推荐引用方式 GB/T 7714	Wurentuya, B.,Yibole, H.,Guillou, F.,et al. First-order magnetic transition, magnetocaloric effect and moment formation in MnFe(P,Ge) magnetocaloric materials revisited by x-ray magnetic circular dichroism[J]. PHYSICA B-CONDENSED MATTER,2018,544:66-72.
APA	Wurentuya, B.,Yibole, H.,Guillou, F.,Ou, Zhiqiang,Zhang, Zhidong,&Tegus, O..(2018).First-order magnetic transition, magnetocaloric effect and moment formation in MnFe(P,Ge) magnetocaloric materials revisited by x-ray magnetic circular dichroism.PHYSICA B-CONDENSED MATTER,544,66-72.
MLA	Wurentuya, B.,et al."First-order magnetic transition, magnetocaloric effect and moment formation in MnFe(P,Ge) magnetocaloric materials revisited by x-ray magnetic circular dichroism".PHYSICA B-CONDENSED MATTER 544(2018):66-72.