Mixing effects of light and heavy rare earths in the Laves phase compounds Nd1-xHRxCo2 (HR = Gd, Tb)

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	Mixing effects of light and heavy rare earths in the Laves phase compounds Nd1-xHRxCo2 (HR = Gd, Tb); Mixing effects of light and heavy rare earths in the Laves phase compounds Nd1-xHRxCo2 (HR = Gd, Tb)
	Z. W. Ouyang; G. H. Rao; H. F. Yang; W. F. Liu; G. Y. Liu; X. M. Feng; J. K. Liang
	2003 ; 2003
发表期刊	Journal of Physics-Condensed Matter ; Journal of Physics-Condensed Matter
ISSN	0953-8984 ; 0953-8984
卷号	15 期号:32 页码:5599-5613
摘要	The mixing effects of light and heavy rare earths in cubic Laves phase compounds Nd1-xHRxCO2 (HR = Gd, Tb) have been investigated by means of x-ray powder diffraction and magnetic measurements. In Nd1-xTbxCo2, the saturation moment M-S exhibits in anomaly and could be ascribed to an abrupt jump of the Co moment at a critical concentration x approximate to 0.33, whereas, in Nd1-xGdxCo2, M-S does not show such an anomaly and a relatively simple magnetic behaviour is observed at x(c) approximate to 0.43. The different behaviours of these two systems can be understood by considering the structural distortion of a cubic unit cell at low temperature. A field-induced metamagnetic transition from weak ferrimagnetism to strong ferrimagnetism is observed in both systems. This can be interpreted by the evolution of magnetization with the help of percolation theory. The compensation points are observed in both systems, which are well explained within the two-sublattice model. A double peak of the AC susceptibility observed in Nd1-xTbxCo2 near x(0) approximate to 0.19 does not necessarily mean the occurrence of a first-order phase transition. The observed second-order magnetic phase transition near x(0) can be well described by Landau theory of the phase transition.; The mixing effects of light and heavy rare earths in cubic Laves phase compounds Nd1-xHRxCO2 (HR = Gd, Tb) have been investigated by means of x-ray powder diffraction and magnetic measurements. In Nd1-xTbxCo2, the saturation moment M-S exhibits in anomaly and could be ascribed to an abrupt jump of the Co moment at a critical concentration x approximate to 0.33, whereas, in Nd1-xGdxCo2, M-S does not show such an anomaly and a relatively simple magnetic behaviour is observed at x(c) approximate to 0.43. The different behaviours of these two systems can be understood by considering the structural distortion of a cubic unit cell at low temperature. A field-induced metamagnetic transition from weak ferrimagnetism to strong ferrimagnetism is observed in both systems. This can be interpreted by the evolution of magnetization with the help of percolation theory. The compensation points are observed in both systems, which are well explained within the two-sublattice model. A double peak of the AC susceptibility observed in Nd1-xTbxCo2 near x(0) approximate to 0.19 does not necessarily mean the occurrence of a first-order phase transition. The observed second-order magnetic phase transition near x(0) can be well described by Landau theory of the phase transition.
部门归属	chinese acad sci, inst phys, beijing 100080, peoples r china. chinese acad sci, ctr condensec matter phys, beijing 100080, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;ouyang, zw (reprint author), chinese acad sci, inst phys, beijing 100080, peoples r china ; chinese acad sci, inst phys, beijing 100080, peoples r china. chinese acad sci, ctr condensec matter phys, beijing 100080, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;ouyang, zw (reprint author), chinese acad sci, inst phys, beijing 100080, peoples r china
关键词	Itinerant-electron Metamagnetism Itinerant-electron Metamagnetism Intermetallic Compounds Intermetallic Compounds Rco2 Rco2 Transition Transition Moment Moment Order Order Er1-xluxco2 Er1-xluxco2 Cobalt Cobalt Yco2 Yco2
URL	查看原文 ; 查看原文
WOS记录号	WOS:000185420400024 ; WOS:000185420400024
引用统计	被引频次：14[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/321006/35982
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. W. Ouyang,G. H. Rao,H. F. Yang,et al. Mixing effects of light and heavy rare earths in the Laves phase compounds Nd1-xHRxCo2 (HR = Gd, Tb), Mixing effects of light and heavy rare earths in the Laves phase compounds Nd1-xHRxCo2 (HR = Gd, Tb)[J]. Journal of Physics-Condensed Matter, Journal of Physics-Condensed Matter,2003, 2003,15, 15(32):5599-5613, 5599-5613.
APA	Z. W. Ouyang.,G. H. Rao.,H. F. Yang.,W. F. Liu.,G. Y. Liu.,...&J. K. Liang.(2003).Mixing effects of light and heavy rare earths in the Laves phase compounds Nd1-xHRxCo2 (HR = Gd, Tb).Journal of Physics-Condensed Matter,15(32),5599-5613.
MLA	Z. W. Ouyang,et al."Mixing effects of light and heavy rare earths in the Laves phase compounds Nd1-xHRxCo2 (HR = Gd, Tb)".Journal of Physics-Condensed Matter 15.32(2003):5599-5613.