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|Title:||Synthesis and characterization of composite Mg Fe2 O4 -BaTi O3 multiferroic system|
|Citation:||Tan, S.Y., Shannigrahi, S.R., Tan, S.H., Tay, F.E.H. (2008). Synthesis and characterization of composite Mg Fe2 O4 -BaTi O3 multiferroic system. Journal of Applied Physics 103 (9) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.2917394|
|Abstract:||Multiferroic ceramics with the general formula (x) Mg Fe2 O4 - (1-x) BaTi O3 (x=0.4, 0.5, and 0.6) were synthesized by solid-state sintering process. From the x-ray diffraction analysis, it was observed that almost no chemical reaction occurs between the ferrite and the ferroelectric materials used to form the diphase composite systems. No impure phase was observed in all the sintered composite systems. Leakage current density, ferroelectric properties and dielectric properties were found to improve with the addition of the ferroelectric phase. For the composite with the least amount of ferrite, the values of remnant polarization (2 Pr) before and after dc magnetic poling at 7 kOe for 1 h were found to be 1.35 and 2.12 μC cm2, respectively. This showed marked improvement as high as 57% and confirmed the coupling of the electrical dipoles with the magnetic field applied. All the studied composite systems proved to be multiferroic in nature. The highest magnetoelectric coupling coefficient of 50.2 mVcm Oe was measured at dc magnetic field of 10 kOe along with ac frequency of 50 Hz at room temperature for the 0.6Mg Fe2 O4 -0.4BaTi O3 composite system. Magnetoelectric effect at resonance frequency increases by a factor of 80 compared to the other frequencies for such composite systems. © 2008 American Institute of Physics.|
|Source Title:||Journal of Applied Physics|
|Appears in Collections:||Staff Publications|
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