Room-temperature magnetoelectric coupling in single-phase BaTiO3-BiFeO3 system
نویسندگان
چکیده
In this paper, single-phase multiferroic ceramics of (1 x) BaTiO3 x BiFeO3 (BT x BFO) were synthesized by solid-solution method in the wide range of material composition (x1⁄4 0.025 – 1.0). The changes in crystal structure were confirmed via X-ray diffractions (XRD) and atomic pair distribution functions (PDFs). The room-temperature ME coupling was found to exhibit significant magnitude in the narrow composition window (x1⁄4 0.71 – 0.8) where the average crystal structure was found to be rhombohedral. Especially, the BT – 0.725 BFO ceramics containing local monoclinic distortions within rhombohedral phase were found to exhibit high room-temperature ME coefficient (aME) of 0.87 mV/cm Oe with high piezoelectric properties (g331⁄4 18.5 10 mV m N 1 and d331⁄4 124 pC N ). We believe that the high room-temperature ME coupling in single-phase lead-free BT-BFO ceramics provides a possibility of developing electrically or magnetically tunable thin-film devices. VC 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4799591]
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