Induced magnetoelectric coupling and photoluminescence response in solution-processed CoFe₂O₄/Pb_0.6Sr_0.4TiO₃ multiferroic composite film

ABSTRACT

CoFe₂O₄/(Pb_0.6Sr_0.4)TiO₃ bi-layered composite film exhibits ferromagnetic and ferroelectric responses (M_s ∼ 162 emu/cm³, H_c ∼ 1.8 kOe, 2P_r ∼ 8.6 µC/cm² and 2E_c ∼ 634 kV/cm) at room temperature. The temperature dependent dielectric anomaly near magnetic phase transition temperature suggests magnetoelectric coupling effect in the composite film. The maximum MD effect can reach as high as ∼49% at 3 kOe applied DC magnetic field. The composite film exhibits magnetoelectric voltage co-efficient α_ME ∼ 67 mVcm⁻¹Oe⁻¹. The photoluminescence emission bands of the composite film have a significant blue shift as compared to those reported for CFO and PST nanostructures.

KEYWORDS:

• CoFe₂O₄/(Pb_0.6Sr_0.4)TiO₃
• multiferroic
• magneto-dielectric
• magnetoelectric
• photoluminescence

Funding

The authors NSN and Kanchan Bala wish to acknowledge Department of Science and Technology (DST), New Delhi, India for providing financial support under project grant no. SR/S2/CMP-0101/2010(G) to carry out the research work.