Strain modulated magnetization and colossal resistivity of epitaxial La2/3Ca1/3MnO3 film on BaTiO3 substrate

Authors

Zhenxiang Cheng, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow
S. X. Dou, University of WollongongFollow
M Osada, National Institute for Material Science, Sengen, Tsukuba
Hideo Kimura, National Institute For Materials Science

RIS ID

38503

Publication Details

Cheng, Z. X., Wang, X. L., Dou, S. X., Osada, M. & Kimura, H. (2011). Strain modulated magnetization and colossal resistivity of epitaxial La_2/3Ca_1/3MnO₃ film on BaTiO₃ substrate. Applied Physics Letters, 99 (9), 092103-1-092103-3.

Abstract

A sharp drop in resistance and a magnetization anomaly have been observed in La_2/3Ca_1/3MnO₃ film in zero magnetic field at the BaTiO₃ substrate structural phase transition temperature, due to the substrate clamping/strain effect, which is confirmed by Raman scattering. However, the anomalies for both resistance and magnetization were eliminated by a strong external magnetic field. These phenomena indicate that strain can cause colossal resistance and a change in magnetization which resembles the magnetic field effect. The interplay of the external forces (strain and magnetic field) is a good demonstration of the strong coupling between spin and lattice in colossal magnetoresistance materials.