Open AccessFabrication of Tl-2212 superconducting thin films by a two-step procedure with post-annealing in a closed container
Author(s) -
Yi Chang-Hong,
Hu Fang-Ren,
Qinggang Zhang,
Yingfei Chen,
Xiaoke Xu,
Dewen Zheng
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.3525
Subject(s) - materials science , annealing (glass) , crystallization , thin film , diffraction , superconductivity , fabrication , lanthanum , x ray crystallography , crystal growth , aluminate , crystallography , analytical chemistry (journal) , composite material , optics , chemical engineering , nanotechnology , condensed matter physics , chemistry , inorganic chemistry , medicine , physics , alternative medicine , pathology , chromatography , engineering , cement
Highquality Tl2Ba2CaCu2Oy(Tl2212) thin films were prepared on s ingle crystal(001) lanthanum aluminate (LaAlO3) substrates by a twostep method. Tlfree amor phous precursor films were first deposited by a pulsed laser deposition techniqu e and then the thalliation, crystallization and oriented growth of the films wer e obtained in the process of annealing treatment in a sealed high-temperature st eel capsule at temperature of 720—850℃ . Xray diffraction reflections reveal th e existence of only Tl2212 phase with nearly perfect caxis orientation. The fu ll width at half maximum of ω scan of (0012) peak was 072°. Scanning electro n m icrographs of the thin films show that the surfaces of the films are smooth. The zeroresistance transition temperature TC0 is 1062K.