Multiferroic properties of bilayered BiFeO^sub 3^/CoFe^sub 2^O^sub 4^ nano-hollowspheres

• Published in: Materials letters Vol. 210; p. 80
• Main Authors: Alam, Mahebub, Talukdar, Souvanik, Mandal, Kalyan
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier BV 01-01-2018
• Subjects: Chemical compounds; Coercivity; Electric properties; Electronic devices; Magnetic devices; Magnetic measurement; Magnetic properties; Magnetic saturation; Magnetism; Magnetization; Materials science; Multiferroic materials; Nanocomposites; Thickness
• ISSN: 0167-577X; 1873-4979

Here, we reported the synthesis of bilayered BiFeO3/CoFe2O4 nano-hollow spheres (NHSs) by depositing a BiFeO3 (BFO) layer of thickness ~20 nm on CoFe2O4 (CFO) nano-hollow spheres surface of diameter ~250 nm and investigated their electric, magnetic and magnetoelectric properties in view of their applications in electronic and magnetic devices. The nano-composites exhibit better properties compared to their individual counterpart. The maximum polarization in CFO/BFO NHSs is found to be 2.1 μC/cm2 at a frequency 50 Hz. Magnetic measurements show the saturation magnetization to be 30.1 emu/g with high value of remnant magnetization (17.9 emu/g), and coercivity (1320 Oe). Its magnetoelectric coefficient, αME at 1 kHz is estimated to be ~8.6 mV/cm Oe.