Low temperature processing of epitaxial La1-xCaxMnO3 thin films by pulsed laser deposition

被引：9

作者：

Leung, YS ^{[1
]}

Wong, KH ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 1998年 / 127卷

关键词：

PLD; LCMO; GMR; epitaxial growth; thin films;

D O I：

10.1016/S0169-4332(97)00680-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Magnetoresistive perovskite-like La0.7Ca0.3MnO3 (LCMO) thin films have been successfully grown on (100)LaAlO3 (LAO) at a relatively low substrate temperature of 600 degrees C-750 degrees C by pulsed laser deposition (PLD) method. Epitaxial LCMO films are obtained at deposition temperature of 650 degrees C or above without post-annealing. The as-deposited films grown at higher substrate temperatures showed lower resistance and higher semiconductor-to-metal transition temperature. For films post-annealed for 1 h at their respective deposition temperatures, a large reduction in their electrical resistivity and an up-shifting of their transition temperature were observed. The maximum magnetoresistance ratio (MR), -Delta R(1 T)/R(0), for the films deposited and annealed at 650 degrees C and 750 degrees C were 37% and 50%,respectively. (C) 1998 Elsevier Science B.V.

引用

页码：491 / 495

页数：5