Paper detail

Abnormal improved dielectric in La doped relaxor ferroelectric PNN-PHT

Relaxor ferroelectrics are complex materials with distinct properties different from classic ferroelectrics. Probing frequency depended dielectric susceptibility is its trait. Other empirical laws build on classic ferroelectrics are still applicable to relaxor ferroelectrics. Here we report an abnormal improved dielectric in La doped relaxor ferroelectric 0.4PNN-0.6PHT, which deviated from the consistent variation relationship with piezoelectric coefficient. A mesoscale mechanism is proposed to reveal the origin of the improved dielectric response in 0.4PNN-0.6PHT, where the polar nanoregions alignment can facilitate polarization response to external field. This mechanism emphasizes the critical role of polarization fluctuation on the macroscopic properties of 0.4PNN-0.6PHT.

preprint2022arXivOpen access

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