Layer-structured Bi_5F_(0.5)Co_(0.5)Ti_3O_(15) Thin Films Grown by Pulsed Laser Deposition

摘要

Layer-structured Bi_5F_(0.5)Co_(0.5)Ti_3O_(15), (BFCTO) ceramics exhibits a large magnetic moment increase of ～ 3 times by substituting half Fe by Co. The material has a four-layer unit cell, and presents a remarkable coexistence of ferroelectricity (FE) and ferromagnetism (FM) above room temperature (RT). The measured 2P_r and 2M_r are 13 μC/cm~2 and 7.8 memu/g, respectively, and the material's magnetic transition temperature is ～ 345 °C. This therefore raised an interest in further exploring the material's potential photonic applications when in thin films. In this research, an initial effort of thin film growth using the advanced pulsed laser deposition (PLD) approach was demonstrated. Such films' structural, morphological, and dielectric properties were studied.