Room temperature ferroelectric-ferromagnetic Bi3.25Sm0.75Ti2.98V0.02O12/La0.67Sr0.33MnO3 double layer heterostructure

Authors

Zhenxiang Cheng, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow
Kiyoshi Ozawa, National Institute for Materials Science, JapanFollow
Hideo Kimura, National Institute for Materials Science, Japan

RIS ID

21135

Publication Details

Cheng, Z, Wang, X, Ozawa, K & Kimura, H (2007), Room temperature ferroelectric-ferromagnetic Bi3.25Sm0.75Ti2.98V0.02O12/La0.67Sr0.33MnO3 double layer heterostructure, Journal of Physics D: Applied Physics, 40, pp. 703-706.

Abstract

A ferroelectric Bi_3.25Sm_0.75Ti_2.98V_0.02O₁₂ (BSVT) film and colossal magnetoresistive La_0.67Sr_0.33MnO₃ (LSMO) film heterostructure on Si with excellent performances of both ferroelectric and ferromagnetic properties at room temperature was fabricated by the pulsed laser deposition method. Saturated magnetization–magnetic field hysteresis loops and polarization–electric field loops proved the materials compatibilities in keeping their own intrinsic properties of LSMO and BSVT in the heterostructure. The remanent polarization (2P_r) of the BSVT is 56 µC cm⁻² at an applied electrical voltage of 11 V. Fatigue measurements show a 25% decrease in remanent polarization after 10⁶ read/write cycles but no further changes afterwards.