A new superconducting cuprate prepared by low-temperature thin-film synthesis in a Ba-Cu-O system

被引：29
作者：
Yamamoto, H
Naito, M
Sato, H
机构：
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1997年 / 36卷 / 3B期
关键词：
new high-T-c cuprate; Ba-Cu-O; low-temperature synthesis; thin film; reactive coevaporation;
D O I：
10.1143/JJAP.36.L341
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A new high-T-c superconducting cuprate composed of Ba, Cu and O was prepared on SrTiO3(001) substrate by reactive coevaporation. The superconducting phase is formed only in the limited temperature range between 575 and 625 degrees C and in a narrow compositional range. Observations of the X-ray diffraction and transmission electron microscopy suggests that the superconducting phase is the 214-based structure. Superconductivity is obtained only after strong oxidation after film growth. The resistivity measurement shows T-c(onset) approximate to 60 to 70 K and T-c(end) less than or equal to 38 K and the magnetic measurement shows T-c(onset) approximate to 85 to 90 K.
引用
收藏
页码：L341 / L344
页数：4
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