New material exploration and magnetism research on Heusler alloys Cr-Co-Ga

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	New material exploration and magnetism research on Heusler alloys Cr-Co-Ga
	Qian, JF ; Feng, L ; Zhu, W ; Liu, EK ; Tang, XD ; Wang, WH ; Wu, GH ; Meng, FB ; Liu, HY ; Luo, HZ
刊名	ACTA PHYSICA SINICA
	2011
卷号	60 期号:5
关键词	MOMENTS
ISSN号	1000-3290
通讯作者	Wu, GH (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	The crystal structure, magnetism and transport properties of a series alloys from Co2CrGa to Cr2CoGa (Co(50-x)Cr(x+25) Ga(25), x = 0-25) have been investigated by the experimental and KKR-CPA-LDA calculation methods. Substituting Cr for Co atoms, the crystal structure changes from L2(1) type to Hg(2)CuTi structure, which make, the lattice parameters increase about 0.69% linearly. Also, the ferromagnetic coupling turns to anti-ferromagnetic coupling, that makes the magnetic moment linearly decrease from 3.06 mu(B) to nearly zero. Through ab initio study of CPA, it has been found that the extraneous Cr atom at the A site couples anti-ferromagnetically with the Cr atom originally situated at B site with a nearly equal magnitude of magnetic moment, and the magnetic moment of Co atoms occupying the C site decreases from 0.60 mu(B) to 0.21 mu(B) through the whole substituting process. Based on the results of magnetic measurement and calculation, about 20% atomic disorder in the alloy Cr2CoGa has been confirmed, which is consistent with the observation of the X-ray examination. It is interesting that a non-linear "middle component phenomenon" has been observed in the composition dependence of both Curie temperature and the electrical resistivity. The related discussions is based on the magnetic environment change surrounding the magnetic atoms.
收录类别	SCI
资助信息	National Natural Science Foundation of China [50971130, 50971055]
语种	中文
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/49849]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Qian, JF,Feng, L,Zhu, W,et al. New material exploration and magnetism research on Heusler alloys Cr-Co-Ga[J]. ACTA PHYSICA SINICA,2011,60(5).
APA	Qian, JF.,Feng, L.,Zhu, W.,Liu, EK.,Tang, XD.,...&Luo, HZ.(2011).New material exploration and magnetism research on Heusler alloys Cr-Co-Ga.ACTA PHYSICA SINICA,60(5).
MLA	Qian, JF,et al."New material exploration and magnetism research on Heusler alloys Cr-Co-Ga".ACTA PHYSICA SINICA 60.5(2011).