CMR effect exalted by substrate-induced strains in thin films of charge ordered manganites

被引：7

作者：

Buzin, E. Rauwel ^{[1
]}

Prellier, W. ^{[1
]}

Mercey, B. ^{[1
]}

de Brion, S. ^{[2
,3
]}

机构：

[1] CNRS, Lab CRISMAT ISMRA, UMR 6508 6, F-14050 Caen, France

[2] CNRS, Grenoble High Magnet Field Lab, F-38042 Grenoble 9, France

[3] MPI FKF, F-38042 Grenoble 9, France

来源：

JOURNAL OF CRYSTAL GROWTH | 2005年 / 275卷 / 1-2期

关键词：

Magnetic fields; Phase diagrams; Laser epitaxy; Manganites; Oxides;

D O I：

10.1016/j.jcrysgro.2004.11.350

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Strained thin films of Nd0.5Ca0.5MnO3 (NCMO) have been synthesized by the pulsed-laser deposition on (1 0 0)-(SrTiO3) (STO). These films of different thicknesses have been extensively studied with numerous techniques of investigation in order to understand the relationship between structure and transport properties in manganite thin films. This study allowed us to highlight the effects of substrate-induced strains on these materials. We observed a huge decrease of the melting magnetic field. This melting field of 5T for thin films is much lower than the one (24 T) necessary to induce the metallic phase in the bulk sample. Films undergo two phenomena: firstly, a deformation of the cell by the substrate-induced strains and secondly a structural quenching which freezes the film's structure. (C) 2004 Elsevier B. V. All rights reserved.

引用

页码：E2409 / E2414

页数：6

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