Surface Study of the Initial Growth of NdBa 2 Cu 3 O 7-y Thin Films on MgO
Surface Study of the Initial Growth of NdBa 2 Cu 3 O 7-y Thin Films on MgO
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MgO 上 NdBa 2 Cu 3 O 7-y 薄膜初始生长的表面研究
DOI：
10.1007/978-4-431-66877-0_290
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Y. Takai
中科院分区：
文献类型：
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作者：
K. Hattori;Shinji Santo;Y. Yoshida;N. Matsunami;Y. Takai
据报道，与YBa2Cu3O7-y超导体相比，NdBa2Cu3O7-y(NBCO)超导体在磁场中具有高临界温度和高临界电流密度。然而，MgO基底上的NBCO薄膜很难持续获得良好的超导性能。此外，关于NBCO薄膜的初始生长机制的报道还很少。在本报告中，我们讨论了通过电子束共蒸发法原位反射高能电子衍射（RHEED）观察制备的NBCO薄膜的初始生长机制。根据原位RHEED观察，当c轴取向的NBCO在MgO基底上生长时，推测BaO层是MgO基底表面上的第一个生长层。
It is reported that NdBa2Cu3O7-y(NBCO) superconductor has high critical temperature and high critical current density in a magnetic field compared with YBa2Cu3O7-ysuperconductor. However it is difficult to get good superconducting properties of NBCO thin films on the MgO substrate constantly. Furthermore, there are little reports about the initial growth mechanism of NBCO thin films. In this report, we discuss the initial growth mechanism of NBCO thin films fabricated by an electron beam co-evaporation method within-situreflection high energy electron diffraction (RHEED) observation. Fromin-situRHEED observation, whenc-axis oriented NBCO grew on the MgO substrate, it was speculated that BaO layer was the first growing layer on the surface of the MgO substrate.