Multiferroic, magnetoelectric and magneto-impedance properties of NiFe^sub 2^O^sub 4^/(Pb, Sr) TiO3 bilayer films

• Published in: Journal of electroceramics 2017-02, Vol.38 (1), p.51
• Main Authors: Negi, Nainjeet Singh, Bala, Kanchan, Shah, Jyoti, Kotnala, Ravinder K
• Format: Article
• Language: English
• ISSN: 1385-3449; 1573-8663
• DOI: 10.1007/s10832-016-0059-5

We prepared NiFe2O4/(Pb, Sr)TiO3 (NFO/PST) bilayer films by the chemical solution method and investigated their multiferroic, magnetoelectric and magneto-impedance properties. Multiferroic properties have been observed at room temperature. The bilayer films exhibit saturation polarization P s 26.6 [mu]C/cm2 and saturation magnetization M s 134 emu/cm3. With increasing Sr content, M s. and P s values of the NFO/PST bilayer films decrease. The variation may be ascribed to the influence of interfacial strain and decrease in tetragonality. High magnetoelectric coupling effect has been observed in the NFO/PST bilayer films with maximum value of [alpha] E = 6.35 Vcm-1 Oe-1 measured at H DC ~ 1 kOe and f ~ 10 kHz for Sr ~ 10% (NFO/PST10). The magneto-impedance measurements establish a strong dependence on magnetic field, further confirming magnetoelectric response in NFO/PST bilayer films. An alternative approach for impedance analysis of NFO/PST10 bilayer film provides direct evidence of strain mediated magnetoelectric coupling at room temperature. The results indicate that NFO/PST bilayer films can be considered as a potential multiferroic magnetoelectric material.