화학공학소재연구정보센터
Current Applied Physics, Vol.11, No.3, S236-S239, 2011
Multiferroic double-perovskite Bi2FeMnO6 hollow particles
Double perovskite structured multiferroic Bi2FeMnO6 hollow particles have been fabricated on silicon substrates from a sol-gel precursor by an electrospray method. The as-prepared Bi2FeMnO6 polycrystalline samples are pure-phase, crystallizing in space group R3c. Raman spectra have verified the vibrational frequencies in the Bi2FeMnO6 samples. The Bi2FeMnO6 nano-/micron-sized hollow particles show a porous shell with large interior void. The shell thickness is similar to 100 nm. The structure and morphology of the sample were found to be controlled by the deposition time. The formation mechanism can be explained by an Ostwald ripening - Kirkendall model. The temperature dependence of the magnetization curve (M-T) and magnetic hysteresis loops indicate that Bi2FeMnO6 particles exhibit weak ferromagnetic moment at both low and room temperature. (C) 2010 Elsevier B.V. All rights reserved.