Mutual transformation of reversible and bound polarization in Y-type BaSrCo2Fe11AlO22 ceramics

Abstract The performance of continuously reversed polarization induced by non-collinear conical magnetic structures was investigated in Y-type BaSrCo2Fe11AlO22 ceramics. The electrical polarization induced by the non-collinear magnetic structures was categorized as reversible polarization and bound polarization. When the range of a circulating magnetic field H ≥ ±1.5 kOe, the P–H loops reached a saturated state and the saturated polarization increased linearly as the circulating magnetic field increased, which was ascribed to the bound polarization. During the continuous magnetic field cycle, a portion of the reversible polarization transformed into bound polarization and only the poling process can achieve inverse transformation. Therefore, the polarization attenuated exponentially as the number of the H cycles increased.