MULTI-FERROIC BiFeO{sub}3 FILMS PREPARED BY LIQUID PHASE EPITAXY AND SOLGEL METHODS

摘要

Liquid phase epitaxy (LPE) and sol-gel methods have been used to grow BiFeO{sub}3 thin films on SrTiO{sub}3 and LaAlO{sub}3 single crystal substrates. XRD pole figures showed that the films were biaxially aligned, with an in plane texture of about 2° and out-plane texture of 0.6°. The LPE films grown on (001) SrTiO{sub}3 had a 4-fold symmetry along the c-axis, indicating they had a heterostructure different from the bulk crystal. Both piezoresponse force microscopy and the ferroelectric measurements showed that the films were ferroelectric. Vibrating sample magnetometry showed that the LPE grown films were ferromagnetic.