Entropy contribution to the stability of double perovskite Sr2FexMo2-xO6

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	Entropy contribution to the stability of double perovskite Sr2FexMo2-xO6
	G. H. Rao; G. Y. Liu; X. M. Feng; Q. Zhang; J. K. Liang
	2005
发表期刊	Science and Technology of Advanced Materials
ISSN	1468-6996
卷号	6 期号:7 页码:750-754
摘要	In contrast to the substitution of exotic elements such as Mn, Cu for Fe or W for Mo in Sr2FeMoO6, the degree of ordering of Fe and Mo in Sr2FexMo2-xO6 shows a maximum at x(C) = 0.95 and decreases as x deviates from x(C). Saturation magnetization depends upon composition in a similar way. It is shown that the entropy due to antisite defects or substitutional disorder can stabilize the double perovskite structure. It is proposed that the stability of the double perovskite structure of Sr2FexMo2-xO(6) is essentially determined by the combined contribution to free energy of configuration entropy and differences in ionic charge and in ionic radius. A plausible charge distribution of Fe and Mo cations in Sr2FexMo2-xO6 is proposed to elucidate the observed composition-dependence of magnetization. (c) 2005 Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100080, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;rao, gh (reprint author), chinese acad sci, inst phys, beijing natl lab condensed matter phys, pob 603, beijing 100080, peoples r china;ghrao@aphy.iphy.ac.cn
关键词	Double Perovskite Cationic Ordering Stability Configuration Entropy Magnetic Moment Sr2femoo6 Double Perovskite Magnetic-properties Electrical Properties Magnetoresistance Fe Transport Site Substitution Transition Disorder
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WOS记录号	WOS:000234328200007
引用统计	被引频次：6[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/321006/35015
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. H. Rao,G. Y. Liu,X. M. Feng,et al. Entropy contribution to the stability of double perovskite Sr2FexMo2-xO6[J]. Science and Technology of Advanced Materials,2005,6(7):750-754.
APA	G. H. Rao,G. Y. Liu,X. M. Feng,Q. Zhang,&J. K. Liang.(2005).Entropy contribution to the stability of double perovskite Sr2FexMo2-xO6.Science and Technology of Advanced Materials,6(7),750-754.
MLA	G. H. Rao,et al."Entropy contribution to the stability of double perovskite Sr2FexMo2-xO6".Science and Technology of Advanced Materials 6.7(2005):750-754.