Sh. Yun et al., STABILITY OF HGBA2CACU2OX SUPERCONDUCTING THIN-FILMS IN LONG-TERM ENVIRONMENTAL EXPOSURE, Journal of superconductivity, 11(1), 1998, pp. 37-38
Highly a-axis oriented HgBa2CaCu2Ox thin films deposited on LaAlO3 sub
strates have been exposed to air at room temperature for a period of 4
00 days. The properties of the exposed sample have been studied by ele
ctrical and magnetic measurements, X-ray diffractometry (XRD), scannin
g electron microscopy(SEM), and energy dispersive X-ray spectrometry (
EDX). No substancial change of superconducting transition temperature
or the structure was observed, but c-peaks reappeared after O(2)re-ann
ealing at 350 degrees C for 16 h.