Enhanced ferroelectricity and ferromagnetism in Bi0.9Ba0.1FeO3/La2/3Sr1/3MnO3 heterostructure grown by pulsed laser deposition

doi:10.1088/1674-1056/23/11/117703

Abstract Bi_0.9Ba_0.1FeO₃ (BBFO)/La_2/3Sr_1/3MnO₃ (LSMO) heterostructures are fabricated on LaAlO₃ (100) substrates by pulsed laser deposition. Giant remnant polarization value (～ 85 μC/cm²) and large saturated magnetization value (～ 12.4 emu/cm³) for BBFO/LSMO heterostructures are demonstrated at room temperature. Mixed ferroelectric domain structures and low leakage current are observed and in favor of enhanced ferroelectric properties in the BBFO/LSMO heterostructures. The magnetic field-dependent magnetization measurements reveal the enhancement in the magnetic moment and improved magnetic hysteresis loop originating from the BBFO/LSMO interface. The heterostructure is proved to be effective in enhancing the ferroelectric and ferromagnetic performances in multiferroic BFO films at room temperature.

Keywords: ferroelectric properties ferromagnetic properties Bi_0.9Ba_0.1FeO₃/La_2/3Sr_1/3MnO₃ heterostructures interface coupling effect

Received: 26 January 2014
Revised: 27 March 2014
Accepted manuscript online:

PACS:	77.80.bn	(Strain and interface effects)
	77.80.Dj	(Domain structure; hysteresis)
	75.70.Cn	(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
	68.37.-d	(Microscopy of surfaces, interfaces, and thin films)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61078057), the Natural Science Foundation of Shannxi Province, China (Grant No. 2011GM6013), the Foundation for Fundamental Research of Northwestern Polytechnical University of China (Grant Nos. JC20110270 and 3102014JCQ01029), the Open Project of Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, China (Grant Nos. LZUMMM2013001 and LZUMMM2014007), and the Scholarship Fund of China (Grant No. 201303070058).

Corresponding Authors: Chen Zhao, Lin Xin
E-mail: zhaoch17@nwpu.edu.cn;xlin@nwpu.edu.cn

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Wen Xiao-Li (温晓莉), Chen Zhao (陈钊), Lin Xin (林鑫), Niu Li-Wei (牛利伟), Duan Meng-Meng (段萌萌), Zhang Yun-Jie (张云婕), Dong Xiang-Lei (董祥雷), Chen Chang-Le (陈长乐) Enhanced ferroelectricity and ferromagnetism in Bi_0.9Ba_0.1FeO₃/La_2/3Sr_1/3MnO₃ heterostructure grown by pulsed laser deposition 2014 Chin. Phys. B 23 117703

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Enhanced ferroelectricity and ferromagnetism in Bi0.9Ba0.1FeO3/La2/3Sr1/3MnO3 heterostructure grown by pulsed laser deposition

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Enhanced ferroelectricity and ferromagnetism in Bi_0.9Ba_0.1FeO₃/La_2/3Sr_1/3MnO₃ heterostructure grown by pulsed laser deposition