Influence of oxygen stoichiometry on Raman phonon spectroscopy, lattice parameters and physical properties of La0.7Ca0.3MnO3 thin films

被引：42

作者：

Malde, N

de Silva, PSIPN

Hossain, AKMA

Cohen, LF

Thomas, KA

MacManus-Driscoll, JL

Mathur, ND

Blamire, MG

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England

[2] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England

[3] Univ Cambridge, Dept Mat Sci, Cambridge CB2 3QZ, England

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 105卷 / 10期

关键词：

magnetic films; crystal structure; inelastic light scattering;

D O I：

10.1016/S0038-1098(97)10205-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this study the influence of annealing at reduced oxygen pressure on electrical transport, Raman active phonon modes and structural properties of several La(0.7)Ca(0.3)MnO(3) thin films has been determined. The out-of-plane lattice parameters and some of the Raman phonon modes were found to be insensitive to oxygenation condition. The temperature at which the peak magnetoresistance occurs and other of the Raman phonon modes, are found to change continuously as a function of decreasing oxygen partial pressure. The Raman studies indicate that small variations of oxygen content induce a structural change. (C) 1998 Elsevier Science Ltd.

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收藏

页码：643 / 648

页数：6

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