Magnetic field dependence of Schottky anomaly in the specific heats of stripe-ordered superconductors La1.6-xNd0.4SrxCuO4

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	Magnetic field dependence of Schottky anomaly in the specific heats of stripe-ordered superconductors La1.6-xNd0.4SrxCuO4
	L. Xie; T. S. Su; X. G. Li
	2012
发表期刊	Physica C-Superconductivity and Its Applications
ISSN	0921-4534
卷号	480 页码:14-18
摘要	The specific heats of the stripe-ordered superconductors La1.6-xNd0.4SrxCuO4 (LNSCO x = 0.10, 0.12, 0.15) under different magnetic fields at low temperatures were systematically studied. It is found that the biggest entropy change associated with the structural transition corresponds to the most stable charge ordering state in sample x = 0.12. At low temperatures, a large Schottky anomaly specific heat appears because of the existence of magnetic rare-earth ions Nd3+. The peak of Schottky anomaly shifts gradually to higher temperatures with increasing magnetic fields, and can be fitted in terms of a model associated with the splitting of the ground-state doublet of Nd3+ in magnetic fields. The value of Lande factor g is about 4.90 +/- 0.08 for all the samples, and much higher than that obtained from Hund's rule for an individual Nd3+ due to the action of crystal field. (C) 2012 Elsevier B.V. All rights reserved.
部门归属	[li, x. g.] univ sci & technol china, dept phys, hefei natl lab phys sci microscale, hefei 230026, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;li, xg (reprint author), univ sci & technol china, dept phys, hefei natl lab phys sci microscale, hefei 230026, peoples r china.;lixg@ustc.edu.cn
关键词	La1.6-xnd0.4srxcuo4 Single Crystal Specific Heat Entropy Schottky Anomaly Temperature Specific-heat Electronic Specific-heat Neutron-scattering Lattice La2-xsrxcuo4 Nd2-yceycuo4 Excitations Capacity Modes
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60356
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Xie,T. S. Su,X. G. Li. Magnetic field dependence of Schottky anomaly in the specific heats of stripe-ordered superconductors La1.6-xNd0.4SrxCuO4[J]. Physica C-Superconductivity and Its Applications,2012,480:14-18.
APA	L. Xie,T. S. Su,&X. G. Li.(2012).Magnetic field dependence of Schottky anomaly in the specific heats of stripe-ordered superconductors La1.6-xNd0.4SrxCuO4.Physica C-Superconductivity and Its Applications,480,14-18.
MLA	L. Xie,et al."Magnetic field dependence of Schottky anomaly in the specific heats of stripe-ordered superconductors La1.6-xNd0.4SrxCuO4".Physica C-Superconductivity and Its Applications 480(2012):14-18.