화학공학소재연구정보센터
Thin Solid Films, Vol.518, No.16, 4730-4733, 2010
Microstructure and magnetic properties of BaTiO3-(Ni,Zn)Fe2O4 multiferroics
The microstructures of composite xBaTiO(3)-(1-x)(Ni0.5Zn0.5)Fe2O4 (BT-NZF) multiferroics with various mixing ratios (x = 0.50, 0.60 and 0.70) are investigated by means of electron backscatter diffraction (EBSD) and magnetic force microscopy (MFM). The EBSD measurements reveal a change in the texture of the ferrite and the BaTiO3 grains upon increasing the ferrite content in the sample. The sample with x = 0.70 exhibits the best ferrite texture, where only some directions are present. Furthermore, the resulting grain sizes vary from several pm (x = 0.50) to about 100 nm in the sample with x = 0.70. The MFM images reveal the presence of magnetic domains being extended over several adjacent grains, which according to the EBSD data may comprise different crystallographic orientations. In this way, we can explain the differences in the magnetic contrast obtained. (C) 2009 Elsevier B.V. All rights reserved.