Evidence of the oxygen vacancies-induced room-temperature ferromagnetism in the (In0.97-xFexSn0.03)(2)O-3 films
Yang, DY; An, YK; Wang, SQ; Wu, ZH; Liu, JW;吴忠华
刊名RSC ADVANCES
2014
卷号4期号:64页码:33680-33686
学科分类Chemistry
DOI10.1039/c4ra04289a
英文摘要In0.97-xFexSn0.03)(2)O-3 films with x - 0.023, 0.05, 0.07 and 0.085 were prepared by RF-magnetron sputtering. The effects of Fe doping and oxygen vacancies on the magnetic and transport properties of the (In0.97-xFexSn0.03)(2)O-3 films are studied systematically by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure (XAFS), Hall effect, R-T and magnetic measurements. Combining X-ray absorption spectroscopy with full multiple-scattering ab initio calculations, it reveals that Fe dopant ions substitute In3+ sites of the In2O3 lattice with a mixed-valence (Fe2+/Fe3+) and form Fe-In1 + 2V(O) complex with O vacancy in the nearest coordination shell. Magnetic characterizations show that all the films display a clear room-temperature (RT) ferromagnetic behavior and the saturated magnetization decreases monotonically with an increase in Fe concentration. Temperature dependent resistivity data suggest the conduction mechanism of the Mott variable range hopping and Hard band gap hopping. The strong localization of carriers suggests the bound magnetic polarons scenario. It can be concluded that the local lattice distortion and oxygen vacancies around the Fe atoms play a key role in the observed intrinsic RT ferromagnetism in the (In0.97-xFexSn0.03)(2)O-3 films. The monotonic reduction in M-s with Fe doping has a strong correlation with the localization radius x of variable range hopping of carriers, indicating that the variation in the localization effect could strongly modify the ferromagnetism of (In0.97-xFexSn0.03)(2)O-3 films.
收录类别SCI
WOS记录号WOS:000341287300006
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225350
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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GB/T 7714
Yang, DY,An, YK,Wang, SQ,et al. Evidence of the oxygen vacancies-induced room-temperature ferromagnetism in the (In0.97-xFexSn0.03)(2)O-3 films[J]. RSC ADVANCES,2014,4(64):33680-33686.
APA Yang, DY,An, YK,Wang, SQ,Wu, ZH,&Liu, JW;吴忠华.(2014).Evidence of the oxygen vacancies-induced room-temperature ferromagnetism in the (In0.97-xFexSn0.03)(2)O-3 films.RSC ADVANCES,4(64),33680-33686.
MLA Yang, DY,et al."Evidence of the oxygen vacancies-induced room-temperature ferromagnetism in the (In0.97-xFexSn0.03)(2)O-3 films".RSC ADVANCES 4.64(2014):33680-33686.
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