%0 Journal Article
%T ON THE HIGH Tc SUPERCONDUCITVITY OF Y-Ba-Cu OXIDE<br>
%J 金属学报
%D 1987
%I 
%X The supercoductivity and structure of Y-Ba-Cu oxide have been investigated by means of electrical resistance and magnetic susceptibility measurements as well as X-ray diffraction, SEM and electron probe microanalysis. The results show that the onset temperature is 107.6K and the zero resistivity state occures at 94.8K with a width of about 2K for the sample of Ba_3Y_2Cu_5O_(5(3-z)). Diamagnetic susceptibility (Meissncr effect)was observed by magnetic susceptibility measurement, and confirmed with electrical resistance determination. The specimen consists mainly of hexagonal (or rhombohedral) ABO_3-type phase with lattice parameter of a=b=0.550nm, c=1.332nm and space group of R3c of R3m. The particles of oxide well connecte up each other, although quite a large number of pores exist. Zero resistance can be kept while up to 2A/cm~2 current passes through the sample.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=814385837874B95F21668E6AC6BD67E5&yid=9C2DB0A0D5ABE6F8&vid=EA389574707BDED3&iid=38B194292C032A66&sid=1D01216AD76577EC&eid=10828928EB89AD8E&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=1