Investigation of polarization switching processes in 0.8PMN-0.2PT single crystal in a temperature range from 100 K to 300 K

Abstract

Ferroelectric hysteresis loops were measured and the temperature evolution of the coercive field traced in [110]-oriented 0.8Pb(Mb_1/3Nb_2/3)O₃–0.2PbTiO₃ single crystal in the temperature range from 120 to 300 K at frequencies from 2 to 50 Hz. It was found that the coercive field rised with decreasing temperature in power-law manner at all frequencies. Temperature-dependent hysteresis model was used for approximation of acquired coercive field-temperature dependences. It was shown that nanoscale ferroelectric domains could be created at PMN-20PT surface by voltage pulses applied between the tip of atomic force microscope and bottom electrode at temperatures as low as 100 K.

Keywords:

• PMN-PT
• polarization
• hysteresis
• PFM
• single crystal

Acknowledgements

We express our gratitude to Institute of Physics of the Southern Federal University for the provided PMN-0.2PT single crystal.

Additional information

Funding

Filimonov A.V. acknowledges the support of Russian Foundation for Basic Research (Grant No. 16-29-14018 and 16-52-48016). Vakulenko A.F. acknowledges the support of the Ministry of Science and Education of the Russian Federation, project no. 3.1150.2017/4.6.