Multiferroic,magnetoelectric and magneto-impedance properties of NiFe2O4/(Pb,Sr) TiO3 bilayer films |
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Authors: | Nainjeet Singh Negi Kanchan Bala Jyoti Shah Ravinder K. Kotnala |
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Affiliation: | 1.Department of Physics,Himachal Pradesh University,Shimla,India;2.CSIR-National Physical Laboratory,New Delhi,India |
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Abstract: | 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 μC/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 α 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. |
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