Frequency-dependent magnetoelectricity of CoFe2O4−BaTiO3
particulate composites
particulate composites
(1. Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;
2. Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand;
3. Magnet Laboratory, School of Science, Walailak University, Nakhon Si Thammarat 80161, Thailand;
4. National Metals and Materials Technology Center (MTEC), Thailand Science Park, Pathumthani 12120, Thailand;
5. School of Physics, Institute of Science, Suranaree University of Technology,
Nakhon Ratchasima 30000, Thailand)
2. Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand;
3. Magnet Laboratory, School of Science, Walailak University, Nakhon Si Thammarat 80161, Thailand;
4. National Metals and Materials Technology Center (MTEC), Thailand Science Park, Pathumthani 12120, Thailand;
5. School of Physics, Institute of Science, Suranaree University of Technology,
Nakhon Ratchasima 30000, Thailand)
Abstract: CoFe2O4−BaTiO3 particulate composites were prepared by wet ball milling method, their magnetoelectric (ME) effect was studied as a function of their constituents and modulation frequency. The results show that the ME coefficient increases as a function of modulation frequency from 400 to 1000 Hz and the ME characteristics of ME curves are also modified because the electrical conductivity of the CoFe2O4 phase is sensitive to the increase in frequency between 400 and 1 000 Hz. The third phase Ba2Fe2O5 formed during the sintering tends to reduce the ME effect.
Key words: ferrite; ferroelectric; CoFe2O4−BaTiO3; magnetoelectric effect; modulation frequency