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

doi:10.1088/0256-307X/30/4/047502

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Abstract：A Ba_0.8Sr_0.2TiO₃/CoFe₂O₄ layered heterostructure film was grown on a Pt/TiO₂/SiO₂/Si substrate by rf-magnetron sputtering. X-ray diffraction shows that the film consists of perovskite Ba_0.8Sr_0.2TiO₃ and spinel CoFe₂O₄ phases. The microstructures of the film were observed by a scanning electron microscope (SEM), showing good surface morphology and clear interfaces among the Ba_0.8Sr_0.2TiO₃ film, the CoFe₂O₄ film and the substrate. The variations of dielectric properties with frequency of the heterostructure film are investigated. The heterostructure film simultaneously displays distinct ferroelectricity and ferromagnetism. Moreover, an obvious magnetoelectric coupling effect was observed in the heterostructure film with a maximum magnetoelectric voltage coefficient of 5.0 mV?cm^?1Oe^?1, which is about seven times larger than that of the Ba_0.8Sr_0.2TiO₃/CoFe₂O₄ particulate composite ceramics in a previous report.

收稿日期: 2012-10-11 出版日期: 2013-04-28

:	75.85.+t	(Magnetoelectric effects, multiferroics)
	75.70.-i	(Magnetic properties of thin films, surfaces, and interfaces)
	75.60.-d	(Domain effects, magnetization curves, and hysteresis)
	77.84.-s	(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)

引用本文:

. [J]. 中国物理快报, 2013, 30(4): 47502-047502.
WANG Ye-An, WANG Yun-Bo, RAO Wei, GAO Jun-Xiong, ZHOU Wen-Li, YU Jun. Electric and Magnetic Properties and Magnetoelectric Effect of the Ba_0.8Sr_0.2TiO₃/CoFe₂O₄ Heterostructure Film by Radio-Frequency Magnetron Sputtering. Chin. Phys. Lett., 2013, 30(4): 47502-047502.

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https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/30/4/047502 或 https://cpl.iphy.ac.cn/CN/Y2013/V30/I4/47502

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