Effect of oxygen post-annealing on the magnetoresistance of highly epitaxial La0.7Ca0.3MnO3 thin films

被引：1
|
作者：
De Santis, A.
Barucca, G.
Bobba, F.
Caciuffo, R.
Froehlich, K.
Pripko, M.
Cucolo, A. M.
机构：
[1] Univ Salerno, Dept Phys ER Caianiello, I-84081 Baronissi, SA, Italy
[2] Univ Salerno, INFM, I-84081 Baronissi, SA, Italy
[3] Univ Politecn Marche, Dept Phys & Mat Engn, INFM Unit, I-60131 Ancona, Italy
[4] Slovak Acad Sci, Inst Elect Engn, Bratislava 84239, Slovakia
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷
关键词：
manganites; thin film; CMR;
D O I：
10.1016/j.jmmm.2003.12.288
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Epitaxial La0.7Ca0.3MnO3 (LCMO) thin films have been deposited by high pressure DC sputtering technique on SrTiO3 substrates. As-grown films exhibit metal - insulator transition temperature (T-MI) with values ranging from 131 to 220 K. The maximum value of the magnetoresistance is of about - 77% in a magnetic field of 0.5 T for T-MI = 131 K. The same films, annealed in a pure oxygen atmosphere, exhibit transitions to a metallic state at temperatures ranging from 210 to 284 K. Transmission electron microscopy analyses show a coherent growth between film and substrate. (C) 2003 Elsevier B. V. All rights reserved.
引用
收藏
页码：E1501 / E1502
页数：2
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