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Title of Journal: Sci China Phys Mech Astron

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Abbravation: Science China Physics, Mechanics and Astronomy

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SP Science China Press

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DOI

10.1002/pits.21906

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1869-1927

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Structural and transport properties of SrSubscrip

Authors: Fei Han XiYu Zhu Gang Mu Peng Cheng Bing Shen Bin Zeng HaiHu Wan
Publish Date: 2010/06/11
Volume: 53, Issue: 7, Pages: 1202-1206
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Abstract

Sr2VO3−δ FeAs superconductors with different oxygen deficiencies have been successfully fabricated It is found that the superconducting transition temperature drops down monotonically with the increase of nominal oxygen deficiency The diminishing of superconductivity is accompanied by the enhancement of residual resistivity indicating an anomalous scattering effect induced by the oxygen deficiency The highest superconducting transition temperature at about 36 K is achieved near the stoichiometrical sample Sr2VO29FeAs The Hall effect measurements reveal that the density of charge carriers electronlike here varies qualitatively with the increase of nominal oxygen deficiency Magnetotransport measurements show that the superconducting transition changes from onesteplike shape at low fields to twosteplike one at high fields indicating an enhanced vortex motion due to the high anisotropy

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