Multiferroic properties of Ni ferrite—PLZT composites

• Published in: Physica. B, Condensed matter Condensed matter, 2010, Vol.405 (1), p.340-344
• Main Authors: Fawzi, Abdul Samee, Sheikh, A.D., Mathe, V.L.
• Format: Article
• Language: English
• Subjects: Coefficients; Condensed matter; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Domain effects, magnetization curves, and hysteresis; Domain structure; hysteresis; Exact sciences and technology; Ferroelectric hysteresis; Ferroelectric materials; Ferroelectricity; Ferroelectricity and antiferroelectricity; Magnetic hysteresis; Magnetic properties and materials; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Magnetoelectric effect; Magnetomechanical and magnetoelectric effects, magnetostriction; Orientation; Phases; Physics; Piezoelectricity and electromechanical effects; SEM; Structural analysis; Zirconium titanates
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2009.08.090

The ferroelectric, magnetic and magnetoelectric properties of ( x) NiFe 2O 4 [NFO]+(1− x) Pb 0.93La 0.07(Zr 0.60Ti 0.40)O 3 [PLZT] composites, where ( x=0, 0.15, 0.30, 0.45, and 1) synthesized using double sintering ceramic method were studied. Structural analysis of these composites using X-ray diffraction (XRD) techniques confirms presence of both the phases in the composite without any impurity or intermediate phase. The scanning electron microscopy (SEM) images recorded in backscattered mode was used to study the microstructure and investigate connectivity scheme in composites. Observation of well saturated ferroelectric hysteresis loops for PLZT phase and their composites, and magnetic hysteresis loops for NFO and composites samples confirms the ferroelectric and magnetic nature of the samples. The magnetoelectric (ME) coefficient (d E/d H) was noted as a function of dc magnetic field for two different orientations viz. transverse and longitudinal and different content of magnetostrictive–piezoelectric phases. Maximum value of static ME voltage coefficient obtained for transverse orientation was 8.9 mV/cm∗Oe in 15% NFO+85%PLZT bulk composites.