Superconductivity Enhancement in Fe3O4 Doped YBa2Cu3O7-delta

	Superconductivity Enhancement in Fe3O4 Doped YBa2Cu3O7-delta
	Dong, XG; An PF(安鹏飞); Zhang J(张静); An, PF; Zhang, J; Zhang, HG; Li, YT; Liu, H; Ge, XP; Li, Q
刊名	JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
	2014
卷号	27 期号:3 页码:693-699
关键词	Superconducting fractions EXAFS XANES Local structure disorder
英文摘要	Flux pinning can lead to the enhancement of J (c) in superconductor. In order to study the effect of magnetic particles on superconductivity, the composites of (YBa2Cu3O7-delta )(0.98)(Fe3O4)(0.02) and (YBa2Cu3O7-delta )(0.98)(alpha-Fe2O3)(0.02) are synthesized with former sintered at different temperatures. The field-cooling measurements show that the T (c) of the samples has not changed. The superconducting properties are enhanced when the samples are sintered at high temperature (750 C-a similar to), but suppressed for the samples without sintering or sintered at low temperature (350 C-a similar to). Scanning electron microscopy images show that the doped Fe3O4 are diffused into intergrain sites. With the increase of sintering temperatures, the grain size of the sample grows up and the flux pinning, which leads to the enhancement of J (c) is formed by the addition of Fe3O4 nanoparticles. The extended X-ray absorption fine structure and X-ray absorption near edge structure experiments prove that after sintered at high temperatures the addition of Fe3O4 can induce disorder of local structures of YBa2Cu3O7-delta . Also, the transition from the tetragonal phase to the orthorhombic phase is observed by the X-ray diffraction spectra. By the above analysis of experimental data, the enhancement of diamagnetic signal, which represents the superconducting properties can be attributed to the disorder enhancement of local structures and structural phase transition of the cuprates induced by the addition of Fe3O4.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000331380000007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225165]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Dong, XG,An PF,Zhang J,et al. Superconductivity Enhancement in Fe3O4 Doped YBa2Cu3O7-delta[J]. JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,2014,27(3):693-699.
APA	Dong, XG.,安鹏飞.,张静.,An, PF.,Zhang, J.,...&Li, Q.(2014).Superconductivity Enhancement in Fe3O4 Doped YBa2Cu3O7-delta.JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,27(3),693-699.
MLA	Dong, XG,et al."Superconductivity Enhancement in Fe3O4 Doped YBa2Cu3O7-delta".JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM 27.3(2014):693-699.