Comparative study on (Na0.47Bi0.47Ba0.06)0.95A0.05TiO3 (A = Sr2+/Ca2+) lead-free ceramics: Scaling behavior of ferroelectric hysteresis loop

Scaling behavior of dynamic hysteresis of (Na0.47Bi0.47Ba0.06)(0.95)A(0.05)TiO(3) (A = Sr2+/Ca2+) (expressed as BNBT-Sr and BNBT-Ca, respectively) lead-free ceramics was comparatively studied. BNBT-Ca exhibits typical ferroelectric hysteresis (polarization vs electric field, P-E) loops, while BNBT-Sr shows pinched P-E loops. The two samples' electric field and frequency-dependent dynamic hysteresis behavior were systematically investigated. The dopants difference (Sr2+/Ca2+) produces different scaling behavior of dynamic hysteresis, which is related to the electric field-induced phase transition and domain size between BNBT-Sr and BNBT-Ca.

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(English Summary) The scaling behavior of dynamic hysteresis of lead-free ceramics BNBT-Sr and BNBT-Ca was comparatively studied. Different scaling behavior was observed due to the difference in dopants, which is related to the electric field-induced phase transition and domain size.