THE A-B ANISOTROPY IN BI2SR2CACU2O8 SUPERCONDUCTOR - AN INVESTIGATION BY RAMAN-SPECTROSCOPY

被引：4

作者：

MARTINEZ, S ^{[1
]}

ZWICK, A ^{[1
]}

RENUCCI, MA ^{[1
]}

NOEL, H ^{[1
]}

POTEL, M ^{[1
]}

机构：

[1] UNIV RENNES 1,CHIM SOLIDES & INORGAN MOLEC LAB,F-35042 RENNES,FRANCE

来源：

PHYSICA C | 1992年 / 200卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(92)90382-M

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In the present paper, we report a study of the Raman active phonons of Bi2Sr2CaCu2O8 for frequencies extending down to 20 cm-1 and temperatures ranging from 77 to 673 K. In spite of important changes in the spectra occurring under heating, we show that the a-b anisotropy, exemplified by Raman spectroscopy in Bi2Sr2CaCU2O8 and obvious on the macroscopic scale through the crystal morphology, still persists at 673 K. These changes are interpreted in terms of disordering effects in the BiO planes and speak in favor of an order-disorder transition around 500 K.

引用

页码：307 / 314

页数：8

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