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In situ fabrication of cobalt-doped SrFe2As2 thin films by using pulsed laser deposition with excimer laser

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9 Author(s)
Choi, Eun-Mi ; Department of Physics and BK21 Physics Division, Sungkyunkwan University, Suwon 440-746, Republic of Korea ; Jung, Soon-Gil ; Lee, Nam Hoon ; Kwon, Young-Seung
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The remarkably high superconducting transition temperature and upper critical field of iron (Fe)-based layered superconductors, despite ferromagnetic material base, open the prospect for superconducting electronics. However, success in superconducting electronics has been limited because of difficulties in fabricating high-quality thin films. We report the growth of high-quality c-axis-oriented cobalt (Co)-doped SrFe2As2 thin films with bulk superconductivity by using an in situ pulsed laser deposition technique with a 248 nm wavelength KrF excimer laser and an arsenic (As)-rich phase target. The temperature and field dependences of the magnetization showing strong diamagnetism and transport critical current density with superior Jc-H performance are reported. These results provide necessary information for practical applications of Fe-based superconductors.

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Applied Physics Letters  (Volume:95 ,  Issue: 6 )