Structural and transport properties of Sr2VO3−δ FeAs superconductors with different oxygen deficiencies
Structural and transport properties of Sr2VO3−δ FeAs superconductors with different oxygen deficiencies
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不同缺氧量Sr2VO3−δ FeAs超导体的结构和输运特性
DOI：
10.1007/s11433-010-4030-1
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
HaiHu Wan
中科院分区：
文献类型：
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作者：
F. Han;Xiyu Zhu;G. Mu;P. Cheng;B. Shen;B. Zeng;HaiHu Wan
不同氧缺陷度的Sr2VO3−δFeAs超导体已成功制备。发现超导转变温度随着标称缺氧量的增加而单调下降。超导性的减弱伴随着残余电阻率的增强，表明缺氧引起的异常散射效应。在化学计量样品 Sr2VO2.9FeAs 附近实现了约 36 K 的最高超导转变温度。霍尔效应测量表明，电荷载流子（此处为电子）的密度随着标称氧缺乏的增加而发生质的变化。磁输运测量表明，超导转变从低场下的一步式形状变为高场下的两步式形状，表明由于高各向异性而增强了涡旋运动。
Sr2VO3−δFeAs 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 Sr2VO2.9FeAs. The Hall effect measurements reveal that the density of charge carriers (electron-like here) varies qualitatively with the increase of nominal oxygen deficiency. Magnetotransport measurements show that the superconducting transition changes from one-step-like shape at low fields to two-step-like one at high fields, indicating an enhanced vortex motion due to the high anisotropy.
Sr2VFeAsO3 和 Sr2ScFePO3 中压力效应的对比
DOI：
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发表时间：
2009
期刊：
J.Phys.Soc.Jpn 78
影响因子：
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作者：
M.Kimura;T.Hatanaka;H.Nomoto;J.Takizawa;T.Fukawa;Y.Tatewaki;H.Shirai;H.Kotegawa
通讯作者：
H.Kotegawa
17K in(Fe2P2)(Sr4Sc2O6) 的超导性：具有厚钙钛矿氧化物层的新型超导层状氮氧化物
DOI：
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发表时间：
2009
期刊：
Supercond.Sci.Technol. 22
影响因子：
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作者：
Naoaki Yabuuchi;Yuto Yamakawa;Kazuhiro Yoshii;Shinichi Komaba;H.Ogino
通讯作者：
H.Ogino