Second-order phase transition in Ca2-xSrxRuO4:: A Raman study

被引：1

作者：

Rho, H. ^{[1
]}

Cooper, S. L.

Nakatsuji, S.

Maeno, Y.

机构：

[1] Chonbuk Natl Univ, Dept Phys, Jeonju 561756, South Korea

[2] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[3] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

[4] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

基金：

美国国家科学基金会; 日本学术振兴会;

关键词：

Raman scattering; Ca2-xSrxRuO4; phase transition;

D O I：

10.1016/j.jmmm.2006.10.351

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use Raman scattering to study the second-order structural transition in metallic Ca2-xSrxRuO4 for x = 0.3. With increasing temperature, the following phonon behaviors are observed in the Raman spectra: the 320 cm(-1) I mode exhibits an enhancement both in peak energy and in intensity near the characteristic temperature T-O similar to 220 K; the 374 cm(-1) mode exhibits a significant decrease in peak energy with increasing temperature toward T-O; and the intensity of the 374cm(-1) mode gradually decreases with increasing temperature, and finally disappears above 230 K. These phonon behaviors suggest that a second-order structural transition occurs in the metallic phase of Ca1.7Sr0.3RuO4 through To similar or equal to 220 K. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：E266 / E268

页数：3

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