Strong Tc dependence for strained epitaxial Ba(Fe1-xCox)2As2 thin films
Strong Tc dependence for strained epitaxial Ba(Fe1-xCox)2As2 thin films
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DOI：
10.1063/1.3259922
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发表时间：
2009-11-09
影响因子：
4
通讯作者：
Holzapfel, B.
中科院分区：
文献类型：
--
作者：
Iida, K.;Haenisch, J.;Holzapfel, B.
Ba（Fe_（1-x）Co_2）（2）As_2超导薄膜具有良好的超导性能。采用脉冲激光沉积法在SrTiO_3、（La，Sr）（Al，Ta）O_3、LaAlO_3和YAlO_3（YAO）单晶基片上生长了纳米晶。所有的电影，除了姚明。已经在没有缓冲层的情况下外延生长。在YAO上沉积的薄膜中含有面内旋转45 °的晶粒，并表现出宽的超导转变。薄膜的起始转变温度从16.2 K增加到24.5 K。随着C/A的增加。主要是由于AsFe 4四面体的轻微变形。从这种相关性，我们预计，在应变外延膜中，超导转变温度高于24.5 K是可能的。(C)2009年美国物理学会。[doi：10.1063/1.3259922]
Ba(Fe1-xCo2)(2)As-2 superconducting thin films have. been grown on SrTiO3, (La, Sr)(Al, Ta)O-3, LaAlO3, and YAlO3 (YAO) single crystal substrates by pulsed laser deposition. All the films, except on YAO. have been grown epitaxially without buffer layers. The films deposited on YAO contained 45 degrees in-plane rotated grains and showed a broad superconducting transition. The onset T-c of the films is observed to increase from 16.2 to 24 5 K. with increasing c/a. mainly due to a slight distortion of the AsFe4 tetrahedron. From this correlation, we expect that higher superconducting transition temperatures than 24.5 K in a strained epitaxial film may be possible. (C) 2009 American Institute of Physics. [doi:10.1063/1.3259922]