Magnetic structure and magnetization process of NdCo12-xVx

doi:10.1103/PhysRevB.71.144430

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	Magnetic structure and magnetization process of NdCo12-xVx
	Rao, GH ; Liu, WF ; Huang, Q ; Ouyang, ZW ; Wang, FW ; Xiao, YG ; Lynn, JW ; Liang, JK
通讯作者	Rao, GH()
	2005-04-01
发表期刊	PHYSICAL REVIEW B
ISSN	1098-0121
卷号	71 期号:14 页码:7
摘要	NdCo12-xVx (2.2 <= x <= 2.6) crystallizes in the ThMn12-type structure and exhibits an unusual jump in the magnetization at a critical field B-C that decreases with increasing V content. It was intriguing that the magnetization of the bulk samples below B-C was very close to that of YCo12-xVx with the same V content. To investigate the nature of the magnetic order in these materials we have carried out powder neutron diffraction measurements as a function of temperature and magnetic field on the NdCo9.5V2.5 composition. In zero field we find that both the Nd and Co ions have substantial ordered moments (similar to 2.9 and 0.4 mu(B), respectively) at low temperature (4 K), with the moments coupled ferromagnetically (T-C=180 K) and aligned along the c axis. On a loose powder an applied field of 4 to 7 T rotates the particles so the c axis aligns with the field, indicating a strong uniaxial anisotropy that renders the system Ising-like. However, we find the same in-field magnetic structure and essentially the same values for the saturated magnetic moments as those in zero field. Magnetization data on magnetically prealigned samples reveal that for fields applied parallel to the (easy) c axis the magnetization saturates below 0.5 T at a magnitude that is in very good agreement with the moments determined from neutron diffraction. For fields applied perpendicular to the c axis, on the other hand, the magnetization data show a two-plateau behavior, explaining the original magnetization data on randomly oriented powders. The strong dependence of the magnetization on the direction of the applied magnetic fields indicates an occurrence of the first-order magnetization process due to the competing magnetocrystalline anisotropies of the Nd and the Co sublattices and of the higher-order terms of the anisotropy energy.
DOI	10.1103/PhysRevB.71.144430
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:000228758700068
出版者	AMER PHYSICAL SOC
引用统计	被引频次：3[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/321006/85333
专题	中国科学院金属研究所
通讯作者	Rao, GH
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	Rao, GH,Liu, WF,Huang, Q,et al. Magnetic structure and magnetization process of NdCo12-xVx[J]. PHYSICAL REVIEW B,2005,71(14):7.
APA	Rao, GH.,Liu, WF.,Huang, Q.,Ouyang, ZW.,Wang, FW.,...&Liang, JK.(2005).Magnetic structure and magnetization process of NdCo12-xVx.PHYSICAL REVIEW B,71(14),7.
MLA	Rao, GH,et al."Magnetic structure and magnetization process of NdCo12-xVx".PHYSICAL REVIEW B 71.14(2005):7.