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V. Giap, R. Grössinger, R. Sato Turtelli:
"Driving mechanism for magnetoelectric effect in CoFe₂O₄-BaTiO₃ multiferroic composite";
Journal of Magnetism and Magnetic Materials, 310 (2007), S. 1157 - 1159.

Driving mechanism for magnetoelectric effect in CoFe₂O₄-BaTiO₃ multiferroic composite

Giap V. Duong a, b, R. Groessinger a and R. Sato Turtelli a

a Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, 1040, Vienna, Austria
b Faculty of Chemical Engineering, Hanoi University of Technology, No.1 Dai Co Viet, Hai Ba Trung, Hanoi, Vietnam

Abstract

The magnetoelectric effect in the CoFe₂O₄-BaTiO₃ core-shell structure composite prepared by wet chemical method occurs mainly due to a coupling between the magnetostrictive and piezostrictive phases. The driving mechanism is attributed to the mechanical coupling through the magnetostriction of the magnetostrictive constituent. The ME coefficient is found to be proportional to an efficiency factor k_o and a coupling coefficient k, defined as k=λ∂λ/∂H, where λ is the linear magnetostriction.

Magnetoelectric effect; Multiferroic composite; Driving mechanism; Barium titanate; Cobalt ferrite

http://dx.doi.org/10.1016/j.jmmm.2006.10.333