Structure and Magnetotransport Properties of Epitaxial Nanocomposite La0.67Ca0.33MnO3:SrTiO3 Thin Films Grown by a Chemical Solution Approach

Authors

Ling Fei
Leyi Zhu
Xuemei Cheng, Bryn Mawr CollegeFollow
Haiyan Wang
Stacy M. Baber
Joshua Hill
Qianglu Lin
Yun Xu
Shuguang Deng
Hongmei Luo

Document Type

Article

Version

Publisher's PDF

Publication Title

Applied Physics Letters

Volume

100

Publication Date

2012

Abstract

Epitaxial La_0.67Ca_0.33MnO₃:SrTiO₃ (LCMO:STO) composite thin films have been grown on single crystal LaAlO₃(001) substrates by a cost effective polymer-assisted deposition method. Both x-ray diffraction and high-resolution transmission electron microscopy confirm the growth of epitaxial films with an epitaxial relationship between the films and the substrates as (002)_film||(002)_sub and [202]_film||[202]_sub. The transport property measurement shows that the STO phase significantly increases the resistivity and enhances the magnetoresistance (MR) effect of LCMO and moves the metal-insulator transition to lower temperatures. For example, the MR values measured at magnetic fields of 0 and 3 T are −44.6% at 255 K for LCMO, −94.2% at 125 K for LCMO:3% STO, and −99.4% at 100 K for LCMO:5% STO, respectively.

Publisher's Statement

Copyright (2012) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 100, 082403 (2012) and may be found at http://apl.aip.org/resource/1/applab/v100/i8/p082403_s1.

Citation

L. Fei et al., Appl. Phys. Lett. 100, 082403 (2012).

DOI

10.1063/1.3688048