%0 Journal Article
%T RELATIONSHIPS OF OXYGEN INDEX AND X-RAY DIFFRACTION LINE PROFILES IN THE PHASE TRANSFORMATION OF YBa_2Cu_3O_(7-x)<br>YBa_2Cu_3O_(7-x)结构转变中氧含量与X射线衍射轮廓的关系
%A ZHOU Hengnan QIU Yan
%A <br>周衡南
%A 邱燕
%J 材料研究学报
%D 1991
%I 
%X The phase transformation of orthorhombic to tetragonal phase ofY-Ba-Cu-O has been investigated in details by X-ray diffraction.This transformation isof the second order or close to second order has been observed and strongly deponds on theoxygen index which changes with annealing temperature.From some X-ray diffractionline-profile measurements have been presented and shown to be useful for identification ofY-Ba-Cu-O and estimation of oxygen index x in details.The effects of oxygen deficiencyand its ordering on the superconductivity also have been investigated.
%K high T_c superconductors YBCO
%K oxygen index
%K X-ray diffraction line-profile
%K order parameter<br>高
%K T_c超导材料YBCO
%K 氧含量
%K X
%K 射线衍射轮廓
%K 序参量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=C99392B86ED8E70E&yid=116CB34717B0B183&vid=94C357A881DFC066&iid=0B39A22176CE99FB&sid=2F56B21F91C9B05B&eid=1F199509C0B6C4D6&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=0&reference_num=1