Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2

doi:10.1103/PhysRevB.71.064405

IMR OpenIR

	Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2
	Ouyang, ZW ; Wang, FW ; Huang, Q ; Liu, WF ; Xiao, YG ; Lynn, JW ; Liang, JK ; Rao, GH
通讯作者	Ouyang, ZW()
	2005-02-01
发表期刊	PHYSICAL REVIEW B
ISSN	1098-0121
卷号	71 期号:6 页码:8
摘要	The crystal and the magnetic structures as well as magnetostriction of the Laves-phase compound NdCo2 are investigated by means of temperature-dependent high-resolution neutron-powder diffraction. The compound crystallizes in the cubic Laves phase C15 structure at high temperature, undergoes a tetragonal distortion (space group I4l/amd) around T(C)approximate to 100 K and an orthorhombic distortion (space group Fddd) at T 42 K. The temperature dependence of lattice constants, magnetostriction constant, and magnetic moment indicate that the magnetic and structural transitions are second order in the vicinity of T-C and are first-order around 42 K. Refinements of magnetic structure reveal that the Nd moment distinctly exhibits an abrupt increase at the first-order transition and the easy magnetization direction of the compound changes from [001] in the tetragonal lattice to [011] in the orthorhombic lattice, indicating a strong coupling between crystal structure and magnetic properties at zero field. Analysis of the temperature dependence of bondlength suggests a strong magnetic exchange striction in the tetragonal structure and that the abrupt increase of the Nd moment is attributed essentially to a change in crystal electric field. Field-dependent neutron diffraction reveals a decoupling of the magnetic and structural transitions under relatively modest magnetic fields.
DOI	10.1103/PhysRevB.71.064405
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:000228013500039
出版者	AMERICAN PHYSICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/82101
通讯作者	Ouyang, ZW
作者单位	1.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China 2.Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA 3.Acad Sinica, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ouyang, ZW,Wang, FW,Huang, Q,et al. Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2[J]. PHYSICAL REVIEW B,2005,71(6):8.
APA	Ouyang, ZW.,Wang, FW.,Huang, Q.,Liu, WF.,Xiao, YG.,...&Rao, GH.(2005).Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2.PHYSICAL REVIEW B,71(6),8.
MLA	Ouyang, ZW,et al."Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2".PHYSICAL REVIEW B 71.6(2005):8.