Journal
SMART MATERIALS AND STRUCTURES
Volume 25, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/25/8/085020
Keywords
lead-free; composite films; magnetoelectric effect; coupling interaction
Funding
- National Natural Science Foundation of China [11264026, 11564028]
- Inner Mongolia Science Foundation for Distinguished Young Scholars [2014JQ01]
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Lead-free magnetoelectric composite films combining Bi4Ti3O12 and CoFe2O4 were synthesized by chemical solution deposition on Pt (100)/Ti/SiO2/Si substrate. Morphological and electrical domain structure, ferroelectric, leakage, dielectric, piezoelectric, magnetic and magnetoelectric properties were investigated for Bi4Ti3O12/CoFe2O4 composite films. Well-defined interfaces between Bi4Ti3O12 and CoFe2O4 film layers and electrical domain structure were observed. The composite films show the coexistence of ferroelectric and ferromagneticorders at room temperature. Larger piezoelectric coefficient and magnetization are obtained for the composite films, which is contributed to the magnetoelectric effect since it originates from the interface coupling through mechanical strain transfer. This work presents a feasible way to modulate the magnetoelectric coupling in ferromagnetic/ferroelectric composite films for developing lead-free micro-electro-mechanical system and information storage devices.
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