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

页码：E1501 / E1502

页数：2

共 5 条

[1] Structural and electrical characterization of magnetoresistive La0.7Ca0.3MnO3 thin films [J].