Ferroelectric and Ferromagnetic Properties and Magnetoelectric Coupling Effect of the Ba0.8Sr0.2TiO3/CoFe2O4 Heterostructure Film by Radio-Frequency Magnetron Sputtering

Authors :: Wang, Ye An
Wang, Yun Bo
Rao, Wei
Gao, Jun Xiong
Zhou, Wen Li
Yu, Jun
Source :: Advanced Materials Research; June 2013, Vol. 712 Issue: 1 p262-266, 5p
Publication Year :: 2013
Abstract: The Ba<subscript>0.8</subscript>Sr<subscript>0.2</subscript>TiO<subscript>3</subscript>/CoFe<subscript>2</subscript>O<subscript>4</subscript> layered heterostructure film was grown on Pt/TiO<subscript>2</subscript>/SiO<subscript>2</subscript>/Si substrate by radio frequency-magnetron sputtering. X-ray diffraction shows that the heterostructure film is composed of perovskite Ba<subscript>0.8</subscript>Sr<subscript>0.2</subscript>TiO<subscript>3</subscript> phase and spinel CoFe<subscript>2</subscript>O<subscript>4</subscript> phase. The microstructures of the heterostructure film were observed by field-emission scanning electron microscope (FESEM), showing good surface morphology and clear interfaces among the Ba<subscript>0.8</subscript>Sr<subscript>0.2</subscript>TiO<subscript>3</subscript> film and CoFe<subscript>2</subscript>O<subscript>4</subscript> film and substrate. The heterostructure film simultaneously diplays distinct ferroelectricity and ferromagnetism. Moreover, an obvious direct magnetoelectric coupling effect is observed in the heterostructure film with a maximum magnetoelectric voltage coefficient of 9.4 mV/cm Oe.

Full Text Access

Tools