Magnetoresistance in Sr2FeMoO6: x glass composites

IMR OpenIR

	Magnetoresistance in Sr2FeMoO6: x glass composites
	Y. Sui; X. Q. Zhang; X. J. Wang; J. G. Cheng; W. H. Su; J. Tang
	2007
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	102 期号:2
摘要	The effects of interfacial states on the temperature dependence of the magnetoresistance (MR) of Sr2FeMoO6-glass composites have been studied. X-ray diffraction analyses show that the glass is most likely located at the grain boundary without causing a change of the crystal structure of Sr2FeMoO6. The variation of the resistance with temperature and magnetic field indicates that the added glass layer has profound influence on the MR properties. At low temperature, the MR in low fields is enhanced notably because the insulating barrier for the intergranular tunneling is improved by adding the glass layer at the grain surface. However, at high temperature, the MR decreases rapidly with the increase of temperature due to, in addition to the enhancement of spin-independent hopping of electrons through the localized states, the fast decay of spin polarization at the surfaces of the grains. This decay is induced by the separation of the ferromagnetic grains with the nonmagnetic glass layer at the grain boundaries.
部门归属	ctr condensed matter sci & technol, harbin inst technol, dept phys, harbin 150001, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. univ new orleans, dept phys, new orleans, la 70148 usa.;sui, y (reprint author), ctr condensed matter sci & technol, harbin inst technol, dept phys, harbin 150001, peoples r china;suiyu@hit.edu.cn
关键词	Room-temperature Magnetoresistance Powder Compacts Oxides
URL	查看原文
WOS记录号	WOS:000248485100061
引用统计	被引频次：12[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/321006/33818
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Sui,X. Q. Zhang,X. J. Wang,et al. Magnetoresistance in Sr2FeMoO6: x glass composites[J]. Journal of Applied Physics,2007,102(2).
APA	Y. Sui,X. Q. Zhang,X. J. Wang,J. G. Cheng,W. H. Su,&J. Tang.(2007).Magnetoresistance in Sr2FeMoO6: x glass composites.Journal of Applied Physics,102(2).
MLA	Y. Sui,et al."Magnetoresistance in Sr2FeMoO6: x glass composites".Journal of Applied Physics 102.2(2007).