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

Chin. Phys. Lett.

2013, Vol. 30

Issue (4): 047502 DOI: 10.1088/0256-307X/30/4/047502

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

Electric and Magnetic Properties and Magnetoelectric Effect of the Ba_0.8Sr_0.2TiO₃/CoFe₂O₄ Heterostructure Film by Radio-Frequency Magnetron Sputtering

WANG Ye-An, WANG Yun-Bo^**, RAO Wei, GAO Jun-Xiong, ZHOU Wen-Li, YU Jun

School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074

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WANG Ye-An, WANG Yun-Bo, RAO Wei et al 2013 Chin. Phys. Lett. 30 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.

Received: 11 October 2012 Published: 28 April 2013

PACS:	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)

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

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	WANG Ye-An
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	RAO Wei
	GAO Jun-Xiong
	ZHOU Wen-Li
	YU Jun

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