Pressure stability of Sm-doped 0.93Pb(Zn1/3Nb2/3)O3–0.07PbTiO3 ferroelectric crystals

Abstract

As the demand for extreme-temperature-pressure exploration grows, the pressure stability of relaxor ferroelectrics, the backbone of piezoelectric sensors, emerges as a decisive factor. Employing a diamond anvil cell (DAC) with in situ XRD, PLM, Raman, and UV-vis spectroscopy, we probe the pressure stability of Sm-doped 0.93Pb(Zn_1/3Nb_2/3)O₃–0.07PbTiO₃ (Sm-PZN–7PT) relaxor ferroelectric crystals. Detailed analysis reveals three phase transitions in Sm-PZN–7PT. Near the phase transition point, changes in the domain structure of Sm-PZN–7PT can be observed via PLM. These domain structural changes can serve as an indicator of concomitant variations in the material's ferroelectric properties and optical absorption characteristics. These findings provide valuable insights into the stability of relaxor ferroelectric materials and offer guidance for the development of piezoelectric sensor devices operable under extreme environments.