%0 Journal Article
%T EFFECTS OF HEAT TREATMENT ON POSITRON ANNIHILATION OF GLASSY BPSCCO<br>热处理对玻璃态Bi1.6Pb0.4Sr1.9Ca2Cu3.1Oy正电子湮没特性的影响
%A ZHANG Hong Shanghai Institute of Metallurgy
%A Academia Sinica
%A <br>张宏
%J 金属学报
%D 1992
%I 
%X Effects of isochronal annealing on the positron annihilation of glassy Bi_(1.6)Pb_(0.4)Sr_(1.9)Ca_2Cu_(3.1)O_y(BPSCCO) have been reported. It is shown that the crystallization in- fluences obviously the positron annihilation characteristics of BPSCCO. A maximum is found inthe region of crystallization temperature in curves of mean lifetime and peak / wing ratio, one of Doppler lineshape parameter, with annealing temperature; the bulk lifetime of positron annihi-lation in the glassy state is longer than that in the crystalline one. Positron annihilation spectroscopy could be used for studying structure of glassy BPSCCO and its change with heattreatment.
%K Bi oxide superconductor
%K positron annihilation
%K glassy state
%K crystallization<br>超导氧化物
%K 正电子湮没
%K 玻璃态
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=875CFEB4F4025938FB9050CAFC0DD73B&yid=F53A2717BDB04D52&vid=D3E34374A0D77D7F&iid=0B39A22176CE99FB&sid=E44E40A2398D4F2A&eid=35FC3610259C2B32&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=1