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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
2014
发表期刊JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
卷号27期号:3页码:693-699
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.
关键词Superconducting fractions EXAFS XANES Local structure disorder
学科领域Physics
DOI10.1007/s10948-013-2343-9
收录类别SCI
WOS记录号WOS:000331380000007
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被引频次:2[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/311005/225165
专题多学科研究中心
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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.
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