MOSSBAUER-EFFECT OF SN-119 DOPED IN HIGH-TC Y-BA-CU-O SUPERCONDUCTOR

被引：10

作者：

CHEN, YL ^{[1
]}

LI, BR ^{[1
]}

CHEN, A ^{[1
]}

XU, BF ^{[1
]}

机构：

[1] HUAZHONG UNIV SCI & TECHNOL,WUHAN 430074,PEOPLES R CHINA

来源：

HYPERFINE INTERACTIONS | 1990年 / 55卷 / 1-4期

关键词：

D O I：

10.1007/BF02397155

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Mössbauer measurements at temperatures ranging from 12 K to 300 K have been carried out on high Tc superconductor YBa2Cu3O6+δ samples doped with Sn (5,2 and 0.5 wt%). The temperature dependent recoilless fraction f(T) has a narrow and small drop nearby transition temperature Tc which is dependent on the Sn-concentration and has a drop between 200-220 K. This indicates the occurrence of phonon softening at these temperatures. The Debye temperature θD of the samples containing 5, 2 wt% Sn atoms was determined as (290±25) K and (320±13) K respectively. These results show that phonons may play an important role for electron pairing in novel oxide superconductor. © 1990 J.C. Baltzer A.G. Scientific Publishing Company.

引用

页码：1249 / 1255

页数：7

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