Abstract
Lead-free 0.725Bi1-xLaxFeO3-0.275Ba0.85Ca0.15Zr0.1Ti0.9O3 (BLF-BCZT, x = 0, 2.5, 5.0, 7.5 and 10.0 mol%) multiferroic ceramics were fabricated via a conventional solid-state reaction method. Effect of La3+ substitution on the structural, electrical and magnetic properties has been studied. XRD patterns show a pure perovskite structure. The SEM images show that the ceramics are dense and pore-free, and the average grain size decreases slightly as La3+ content increases. The Neel temperature decreases with the increasing La content from 428.0°C to 404.0°C, whereas the Curie temperature increases from 610.2°C to 620.4°C for BLF-BCZT ceramics with 5.0 mol% La. Ferroelectric properties are improved and optimized at x = 2.5 mol%: Pr = 1.48 μC/cm2, Pmax = 4.56 μC/cm2, Ec = 1120V/mm. Maximum of Mr is obtained for 7.5 mol% La doped samples, which is 0.50 emu/g, showing a ferromagnetic nature.
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