Epitaxial HgBa2Ca2Cu3Oyfilms on SrTiO3substrates prepared by spray pyrolysis technique
作者:
Y. Moriwaki,
T. Sugano,
C. Gasser,
A. Fukuoka,
K. Nakanishi,
S. Adachi,
K. Tanabe,
期刊:
Applied Physics Letters
(AIP Available online 1996)
卷期:
Volume 69,
issue 22
页码: 3423-3425
ISSN:0003-6951
年代: 1996
DOI:10.1063/1.117280
出版商: AIP
数据来源: AIP
摘要:
HgBa2Ca2Cu3Oy(Hg‐1223) films with a thickness of 1–2 &mgr;m andTc(zero)∼130 K have been fabricated by utilizing a spray pyrolysis technique. X‐ray diffraction indicates that the films consist of predominantly Hg‐1223 phase grains withc‐axis orientation. Moreover, the oscillation photograph taken by a Weissenberg camera confirms that the film grains are in‐plane aligned and epitaxially grown on SrTiO3. In electrical transport measurements, the as‐fabricated film exhibits aTc(zero) of 123 K, and a zero‐fieldJcof 3.7×105A/cm2at 77 K. Additional post‐annealing at 320 °C for 50 h in flowing oxygen has improved the transport properties asTc(zero)∼130 K andJc∼4.4×105A/cm2(77 K, 0 T). ©1996 American Institute of Physics.
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