CORRELATION BETWEEN TWEED,TWINNING,AND FLUX PENETRATION IN YBa2(Cu1-x,Fex)3O7-δ
作者单位：Fachbereich MaterialwissenschaftTechnische Hochschule DarmstadtGermany
会议名称：《Sixteenth Congress of the International Union of Crystallography》
会议日期：1993年
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学]
摘 要：The decrease of the orthorhombicity with increasing x in substituted YBa(Cu,M)O,(M=Fe,Co,or Al),leads to a decrease in lamellar spacing between the {110} twin walls when x approaches *** phase change to macroscopically tetragonal symmetry(x0.03) occurs when the twin wall spacing gets approximately equal to or smaller than the thickness of the twin walls(30-50A).In the macroscopically tetragonal material,the (110) and(110).twin orientations interpenetrate,resulting in a