Ferroelectric, Magnetic and Magnetoelectric Properties of Ferroelectric Rich Ni_0.8Zn_0.2Fe₂O₄-PbZr_0.65Ti_0.35O₃ ME Composites

Abstract

Magnetostrictive-piezoelectric (magnetoelectric) composites using magnetostrictive nickel zinc ferrite (NZF) and piezoelectric lead zirconate titanate (PZT) having compositional formula yNi_0.8Zn_0.2Fe₂O₄-(1-y)PbZr_0.65Ti_0.35O₃ (0 ≤ y ≤ 0.15 in the steps of 0.05) were synthesized by conventional solid state method. Room temperature P-E and M-H hysteresis loops were recorded to study ferroelectric and magnetic properties of composites respectively. Effect of electric poling on values of remanant magnetization (M_r) and saturation magnetization (M_s) was studied for all composite samples (y = 0.05, 0.10 and 0.15) to confirm magnetoelectric (ME) coupling. ME coefficient (dE/dH) was measured as a function of dc magnetic field for all composite samples.

Keywords:

• Ferroelectric
• piezoelectric
• ferromagnetic
• magnetostriction
• magnetoelectric

Acknowledgment

One of the authors (Rekha Rani) would like to thank Department of Science & Technology, Govt. of India for awarding INSPIRE fellowship to her. Authors are thankful to Dr. R.K. Kotnala of National Physical Laboratory, New Delhi for helping in magnetization measurements.

Communicated by Prof. Amar S. Bhalla