FERROELECTRICITY IN THE REBA2CU3O7-DELTA SUPERCONDUCTORS

被引：56

作者：

KURTZ, SK ^{[1
]}

CROSS, LE ^{[1
]}

SETTER, N ^{[1
]}

KNIGHT, D ^{[1
]}

BHALLA, A ^{[1
]}

CAO, WW ^{[1
]}

LAWLESS, WN ^{[1
]}

机构：

[1] CERAM PHYS INC,WESTERVILLE,OH 43081

来源：

MATERIALS LETTERS | 1988年 / 6卷 / 10期

关键词：

BARIUM COMPOUNDS - Electric Properties - COPPER OXIDE - Electric Properties - OXIDES - RHENIUM COMPOUNDS - Electric Properties - SUPERCONDUCTING MATERIALS - Electric Properties;

D O I：

10.1016/0167-577X(88)90114-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this letter, the authors report a number of indirect pieces of evidence which suggest that at a low temperature, which is still above the superconducting transition temperature T//s//c, the material undergoes a diffuse phase change to a relaxor-type ferroelectric state. Such a transition has already been suggested by J. F. Scott based upon temperature dependence of the Raman scattering. In particular the appearance of a peak at 646 cm** minus **1 at temperatures below 240 K in the yttrium compound (Re equals Y) has been taken as indicating a transition from a non-polar mmm crystal symmetry to a polar mm2 symmetry. A hypothetical discussion of a possible relation between high-temperature superconductivity and 'quasi-ferroelectricity' has also been given by Zhongjin Yang and co-workers.

引用

页码：317 / 320

页数：4

共 30 条

[1] ATOMIC DISPLACEMENT RELATIONSHIP TO CURIE TEMPERATURE AND SPONTANEOUS POLARIZATION IN DISPLACIVE FERROELECTRICS [J].