H+ irradiation effect in Co-doped BaFe2As2 single crystals

被引：4
|
作者：
Nakajima, Y. [1 ,2 ]
Tsuchiya, Y. [1 ]
Taen, T. [1 ]
Tamegai, T. [1 ,2 ]
Kitamura, H. [3 ]
Murakami, T. [3 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[2] JST, Transformat Res Project Iron Pnictides TRIP, Bunkyo Ku, Tokyo 1138656, Japan
[3] Natl Inst Radiol Sci, Inage Ku, Chiba 2638555, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2011年 / 471卷 / 21-22期
关键词：
Iron-pnictide superconductor; Proton irradiation; Point defect; TRANSPORT-PROPERTIES; BA0.6K0.4FE2AS2;
D O I：
10.1016/j.physc.2011.05.017
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the suppression of the critical temperature T-c in single crystalline Ba(Fe1-xCox)(2)As-2 at under-, optimal-, and over-doping levels by 3 MeV proton irradiation. T-c decreases and residual resistivity increases monotonically with increasing the dose. The low-temperature resistivity does not show the upturn in contrast with the alpha-particle irradiated NdFeAs(O,F), which suggests that proton irradiation introduces nonmagnetic scattering centers. Critical scattering rates for all samples obtained by three different ways are much higher than that expected in s(+/-)-pairing scenario based on inter-band scattering due to antiferro-magnetic spin fluctuations. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：647 / 650
页数：4
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