화학공학소재연구정보센터
Applied Surface Science, Vol.355, 121-126, 2015
Multiferroic properties of (Bi, Ca)FeO3 films on glass substrates
Effect of Ca substitution on the multiferroic properties of non-epitaxially grown polycrystalline Bi1-xCaxFeO3 (BCFO) films on refined Pt(111) electrode buffered glass substrates is studied. The structural analysis shows that a pure perovskite phase with isotropic orientation is present for BCFO films (x = 0.05-0.15). The grain size and surface roughness are reduced with increasing x. Different from the BCFO ceramics, good ferroelectric properties with the remanent polarization (2P(r)) of 91-124 mu C/cm(2) and electrical coercive field (E-c) of 294-394 kV/cm are obtained in BCFO polycrystalline thin films. Furthermore, the substitution of Ca2+ for Bi3+ effectively enhance the ferromagnetic properties with magnetization (M-s) of 5.9-8.2 emu/cm(3) and coercivity (H-c) of 1224-1258 Oe. The ferromagnetic and ferroelectric properties and leakage behavior as functions of Ca content x are discussed. (C) 2015 Elsevier B.V. All rights reserved.