Molecular beam epitaxy of superconducting Pr2CuO4 films |
| |
Authors: | H Yamamoto O Matsumoto K Yamagami M Naito |
| |
Institution: | a NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japanb Department of Applied Physics, Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, Tokyo 184-8588, Japan |
| |
Abstract: | Recent reports on superconductivity in parent compounds RE = Pr, Nd, Sm, Eu, Gd] prepared by metal-organic decomposition (MOD) shed new light on the electronic and magnetic phase diagram of electron-doped cuprates. A thorough reduction process is the key to inducing superconductivity in square-planar coordinated cuprates. In this work, Pr2CuO4 films were grown epitaxially by molecular beam epitaxy (MBE) on (001)SrTiO3, (110)GdScO3 and (110)DyScO3 substrates. A modified two-step reduction process is required in order to obtain single-phase superconducting samples. The optimized superconducting properties are , while the room-temperature resistivity is about . Hence, we show that even amorphous Pr2CuOy films deposited on (110)DyScO3 become superconducting after the application of the two-step annealing process. These results indicate that superconductivity is induced to Pr2CuO4 by systematic optimization of the reduction conditions, irrespective of the synthesis route. |
| |
Keywords: | A Parent compound superconductors B MBE B Two-step annealing C Nd2CuO4 (_method=retrieve& _eid=1-s2 0-S0038109811001268& _mathId=si36 gif& _pii=S0038109811001268& _issn=00381098& _acct=C000069490& _version=1& _userid=6211566& md5=06e84fc8d9b0c50332be55c088c182c4')" style="cursor:pointer T&prime" target="_blank">" alt="Click to view the MathML source" title="Click to view the MathML source">T&prime ) structure |
本文献已被 ScienceDirect 等数据库收录! |
|