Hole doping effects in (Sr2-xNax)FeMoO6 double perovskite

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	Hole doping effects in (Sr2-xNax)FeMoO6 double perovskite
	Q. Zhang; G. H. Rao; Y. G. Xiao; G. Y. Liu; Y. Zhang; J. K. Liang
	2006
发表期刊	Applied Physics a-Materials Science & Processing
ISSN	0947-8396
卷号	84 期号:4 页码:459-463
摘要	Hole-doped double perovskite compounds (Sr,Na)(2)FeMoO6 with the Na content of x=0,0.02,0.03,0.07 and 0.17 have been synthesized by sol-gel method. Effects of hole doping on the crystal structure and magnetic properties of Sr2FeMoO6 have been investigated by means of X-ray powder diffraction (XRD) and magnetic measurements. The XRD pattern indicates that all the samples are of single phase and belong to the space group I4/m. Due to the smaller ionic radius of Na+ than that of Sr2+ ions, the lattice constants and unit cell volume of the compound decrease slightly with x. The degree of cation ordering in the Na-doped Sr2FeMoO6 compounds shows a non-monotonic variation with the doping level, increasing from x=0 to x=0.03 and decreasing slightly with further increase of the doping. In contrast to the composition dependence of the degree of ordering, the Curie temperature of the compound decreases at low doping level and increases at high doping level. The saturation magnetization of the compound increases with x for x < 0.17. Similar to the electron-doped Sr2FeMoO6, provided that the doped hole enters selectively the spin-down band, the variation of the saturation magnetization can be explained in light of the ferrimagnetic model (FIM).
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 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;ghrao@aphy.iphy.ac.cn
关键词	Electronic-structure Magnetic-properties Sr2femoo6 Magnetoresistance Temperature Site
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WOS记录号	WOS:000244090700017
引用统计	被引频次：8[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/321006/34703
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,Y. G. Xiao,et al. Hole doping effects in (Sr2-xNax)FeMoO6 double perovskite[J]. Applied Physics a-Materials Science & Processing,2006,84(4):459-463.
APA	Q. Zhang,G. H. Rao,Y. G. Xiao,G. Y. Liu,Y. Zhang,&J. K. Liang.(2006).Hole doping effects in (Sr2-xNax)FeMoO6 double perovskite.Applied Physics a-Materials Science & Processing,84(4),459-463.
MLA	Q. Zhang,et al."Hole doping effects in (Sr2-xNax)FeMoO6 double perovskite".Applied Physics a-Materials Science & Processing 84.4(2006):459-463.