Canted magnetic structure arising from rare-earth mixing in the Laves-phase compound (Nd0.5Tb0.5)Co-2

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	Canted magnetic structure arising from rare-earth mixing in the Laves-phase compound (Nd0.5Tb0.5)Co-2
	Xiao, YG ; Huang, Q ; Ouyang, ZW ; Wang, FW ; Lynn, JW ; Liang, JK ; Rao, GH
刊名	PHYSICAL REVIEW B
	2006
卷号	73 期号:6
关键词	NEUTRON POWDER-DIFFRACTION RCO2 TRANSITION HEAVY LIGHT
ISSN号	1098-0121
通讯作者	Xiao, YG: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100080, Peoples R China.
中文摘要	The crystal and magnetic structures of Laves-phase compound (Nd0.5Tb0.5)Co-2 have been investigated by high resolution neutron powder diffraction at different temperatures. Magnetization measurement and neutron diffraction reveal two magnetic transitions at T-C approximate to 173 K and T-M approximate to 47 K, respectively. At room temperature, the compound crystallizes in the MgCu2-type (C15) structure. Below T-C, rhombohedral distortion and large anisotropic magnetostriction take place and persist down to 4 K. In contrast to the binary rare earth (R)-Co Laves-phases RCo2, a noncollinear magnetic structure (canted) is deduced for (Nd0.5Tb0.5)Co-2, based on the Rietveld refinement of the neutron diffraction data at 50 K and 4 K. In addition, the correlation between lattice distortion and easy magnetization direction (EMD) commonly observed for binary RCo2 is violated in (Nd0.5Tb0.5)Co-2. Though the crystal structure remains rhombohedral, the EMD of the R sublattice is close to the [110] direction at 50 K of the pseudocubic lattice and along the [111] direction at 4 K, respectively. The difference of the canting angle between the magnetic structures at 50 K and 4 K is small, indicating stable canted configurations. The lattice parameters exhibit a discontinuity around T-M, suggesting a first-order transition between the two canted magnetic structures. The dilution of magnetic anisotropy of the R sublattice and the contribution of the magnetic anisotropy of the Co sublattice are responsible for the observations.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/34463]
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	Xiao, YG,Huang, Q,Ouyang, ZW,et al. Canted magnetic structure arising from rare-earth mixing in the Laves-phase compound (Nd0.5Tb0.5)Co-2[J]. PHYSICAL REVIEW B,2006,73(6).
APA	Xiao, YG.,Huang, Q.,Ouyang, ZW.,Wang, FW.,Lynn, JW.,...&Rao, GH.(2006).Canted magnetic structure arising from rare-earth mixing in the Laves-phase compound (Nd0.5Tb0.5)Co-2.PHYSICAL REVIEW B,73(6).
MLA	Xiao, YG,et al."Canted magnetic structure arising from rare-earth mixing in the Laves-phase compound (Nd0.5Tb0.5)Co-2".PHYSICAL REVIEW B 73.6(2006).