YBa_2(Cu_(3-x),Sn_x)O_(7-δ)的穆斯堡尔谱学研究  

MOSSBAUER SPECTROSCOPY STUDIES FOR YBa_2(Cu_(3-x),Sn_x)O_(7-δ)

作　　者：焦洪震[1] 王桂琴[1] 陈婉蓉 杨建伦 赵骥万[1] 李惠祥[2] 吴泳华[2] 

机构地区：[1]南京大学物理系,南京210008 [2]中国科学技术大学物理教学研究组,合肥230026

出　　处：《物理学报》1990年第7期1170-1173,共4页Acta Physica Sinica

摘　　要：本文用~119Sn穆斯堡尔谱学的方法研究了高T_c超导材料YBa_2(Cu_(3-x),Sn_x)O_7-89在置换元素Sn为大置换量的情况,发现一直到x=1.0,仍有T_c>80K。通过穆斯堡尔谱的分析,认为Sn置换的是Cu(1)晶位上的离子,从而得出对超导起决定性作用的是Cu(2)晶位离子的结论。The high Tc superconducting material YBAa2 (Cu1-x, Snx)O7_δ with large content of substitution element was studied by using 119Sn Mossbauer spectroscopy. The work shows rhat with the content of substitution element up to x = 1.0, Tc is still higher than 80 K. The analysis for Mossbauer spectrum have revealed that Sn ions substitute for ions at Cu(l) site in YBa2Cu3O7-δ. So that lead us to conclude that ions at Cu(2) site appear to piay decisive role for superconductivity.

关 键 词：穆斯堡尔谱学 超导材料 离子置换 

分 类 号：TM262[一般工业技术—材料科学与工程]