Dielectric, magnetic and magnetoelectric properties of ferrite-ferroelectric based particulate composites

作者：Kumar Yogesh; Yadav K L; Shah Jyoti; Kotnala R K

来源：Materials Research Express, 2018, 5(8): 085701.

DOI：10.1088/2053-1591/aad371;085701

• x-ray diffraction
• microstructure
• dielectric constant
• hysteresis

Particulate composites based on ferrite and ferroelectric phase viz. cobalt zinc ferrite (Co0.8Zn 0.2Fe2O4 ) and bismuth sodium titanate (Bi0.5Na0.5TiO3) were synthesized using solid state reaction method. The formation of diphase composite was established using x-ray diffraction. Field emission scanning electron microscopy was used to study the microstructure of the composites, exhibiting fine blending of constituent phases in the composites. Dielectric behaviour of the composites was studied as a function of temperature and frequency. Variation of dielectric constant with temperature exhibits a shift in Curie temperature with increase in ferrite content. Usual dielectric dispersion is observed for the composites with increase in frequency. The consequence of addition of ferrite phase on ferroelectric and magnetic properties of composites was studied. All composites exhibit typical ferromagnetic hysteresis loops. Magnetoelctric coupling in the composites was confirmed by measuring magnetoelctric voltage coefficient (alpha(ME)). The maximum a ME of 7.11 mV cm(-1) -Oe was obtained for 10% Co0.8Zn0.2Fe2O4-90% Bi0.5Na0.5TiO3 composite.

• 出版日期2018-8