Structural, magnetic and transport properties of double perovskite compounds (Sr2-3xLa2xBax)FeMoO6

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	Structural, magnetic and transport properties of double perovskite compounds (Sr2-3xLa2xBax)FeMoO6
	Q. Zhang; G. H. Rao; H. Z. Dong; Y. G. Xiao; X. M. Feng; G. Y. Liu; Y. Zhang; J. K. Liang
	2005
发表期刊	Physica B-Condensed Matter
ISSN	0921-4526
卷号	370 期号:1-4 页码:228-235
摘要	The crystal structure and magnetic properties of a series of ordered double perovskite oxides (Sr2-3xLa2xBax)FeMoO6 (0 <= x <= 0.3) have been investigated. X-ray powder diffraction reveals that the crystal structure of the compounds changes from a tetragonal I4/m lattice to a cubic Fm (3) over barm. lattice around x = 0.2. Though the nominal average size of the A site cation of (Sr2-3xLa2xBax)FeMoO6 is designed to be almost independent of x, the refinements of the crystal structure show that the lattice constants increase with x in both the tetragonal and the cubic phase regions due to electron doping. As the x increases, the degree of cationic ordering on the B site is decreased pronouncedly, while the Curie temperature of the compounds is nearly unchanged. The saturation magnetization of the compounds decreases with x and shows a linear dependence on the degree of cation ordering. The resistivity of the parent compound shows a semiconducting behavior below room temperature, but those of the doped samples exhibit a metal-semiconductor transition. A correlation between the resistivity and metal-semiconducting transition temperature (TM-S) is observed. The resistivity and TM-S of the compounds decrease with x for x <= 0.2 and increase for x >= 0.2. Magnetoresistance of the compounds is reduced by the La/Ba doping. All these observations can be understood based on the interplay of the electron doping, change in bandwidth and the anti-site defect concentration. (c) 2005 Elsevier B.V. All rights reserved.
部门归属	chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100080, peoples r china. univ qinghai, xining 810016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, 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;zhq@aphy.iphy.ac.cn ghrao@aphy.iphy.ac.cn
关键词	Double Perovskite Electron Doping Crystal Structure Magnetoresistance Low-field Magnetoresistance Sr2femoo6 Temperature Transition Disorder
URL	查看原文
WOS记录号	WOS:000234057800031
引用统计	被引频次：19[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/321006/35221
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. Zhang,G. H. Rao,H. Z. Dong,et al. Structural, magnetic and transport properties of double perovskite compounds (Sr2-3xLa2xBax)FeMoO6[J]. Physica B-Condensed Matter,2005,370(1-4):228-235.
APA	Q. Zhang.,G. H. Rao.,H. Z. Dong.,Y. G. Xiao.,X. M. Feng.,...&J. K. Liang.(2005).Structural, magnetic and transport properties of double perovskite compounds (Sr2-3xLa2xBax)FeMoO6.Physica B-Condensed Matter,370(1-4),228-235.
MLA	Q. Zhang,et al."Structural, magnetic and transport properties of double perovskite compounds (Sr2-3xLa2xBax)FeMoO6".Physica B-Condensed Matter 370.1-4(2005):228-235.