文摘
The present paper reports magnetoelectric and magnetodielectric properties of Lab>0.67b>Srb>0.33b>MnOb>3b> and (Bab>0.7b>Cab>0.3b>TiOb>3b>)–(BaZrb>0.2b>Tib>0.8b>Ob>3b>) composites. y(Lab>0.67b>Srb>0.33b>MnOb>3b>) + (1 − y)[x(Bab>0.7b>Cab>0.3b>TiOb>3b>)–(1 − x)(BaZrb>0.2b>Tib>0.8b>Ob>3b>)] particulate composites are prepared for x = 0.40, 0.45, and 0.50 and for y = 0.1 and 0.175. Ferroelectric compositions [x(Bab>0.7b>Cab>0.3b>TiOb>3b>)–(1 − x)(BaZrb>0.2b>Tib>0.8b>Ob>3b>)] are synthesized via ceramic route, while Lab>0.67b>Srb>0.33b>MnOb>3b> is synthesized via hydroxide co-precipitation route. Composites of Lab>0.67b>Srb>0.33b>MnOb>3b> and (Bab>0.7b>Cab>0.3b>TiOb>3b>)–(BaZrb>0.2b>Tib>0.8b>Ob>3b>) are synthesized using ceramic method. The crystal structures of Lab>0.67b>Srb>0.33b>MnOb>3b>, [x(Bab>0.7b>Cab>0.3b>TiOb>3b>)–(1 − x)(BaZrb>0.2b>Tib>0.8b>Ob>3b>)], and composites are investigated using X-ray diffractograms, while microstructures are investigated using scanning electron microscope. The dielectric properties of [x(Bab>0.7b>Cab>0.3b>TiOb>3b>)–(1 − x)(BaZrb>0.2b>Tib>0.8b>Ob>3b>)] are determined as a function of temperature between 30 and 150 °C and at frequencies 1, 10, 100 kHz, and 1 MHz. The investigations on P–E hysteresis loops of [x(Bab>0.7b>Cab>0.3b>TiOb>3b>)–(1 − x)(BaZrb>0.2b>Tib>0.8b>Ob>3b>)] show useful values of maximum polarization (P b>maxb>) and remanent polarization (P b>rb>). Dielectric study on composites is carried out as a function of frequencies between 1 kHz and 1 MHz and for magnetic field between 0 and 6 KOe. The linear magnetoelectric coefficient “α” and quadratic magnetoelectric coefficient “β” are measured with the help of custom-designed setup. The results on magnetoelectric and magnetodielectric properties of composites are interesting.