Fabrication of FeSe1−x superconducting films with bulk properties |
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| Authors: | Soon-Gil Jung NH Lee Eun-Mi Choi WN Kang Sung-Ik Lee Tae-Jong Hwang DH Kim |
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| Institution: | 1. BK21 Physics Division and Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of Korea;2. Department of Physics, National Creative Research Initiative Center for Superconductivity, Sogang University, Seoul 121-742, Republic of Korea;3. Department of Physics, Yeungnam University, Gyeongsan 712-749, Republic of Korea |
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| Abstract: | We have fabricated high-quality FeSe1−x superconducting films with a bulk Tc of 11–12 K on different substrates, Al2O3(0 0 0 1), SrTiO3(1 0 0), MgO(1 0 0), and LaAlO3(1 0 0), by using a pulsed laser deposition technique. All the films were grown at a high substrate temperature of 610 °C, and were preferentially oriented along the (1 0 1) direction, the latter being to be a key to fabricating of FeSe1−x superconducting thin films with high Tc. According to the energy dispersive spectroscopy data, the Fe:Se composition ratio was 1:0.90 ± 0.02. The FeSe1−x film grown on a SrTiO3 substrate showed the best quality with a high upper critical magnetic field Hc2(0)] of 56 T. |
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| Keywords: | FeSe1&minus x films Iron-based superconductors Pulsed laser deposition |
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