Temperature-Induced Phase Transition Characteristics of [001]-Oriented 0.93Pb(Zn1/3Nb2/3)O3-0.07PbTiO3 (PZN-7%PT) Single Crystal by Using Piezoresponse Force Microscopy

作者：Wang, Hongli; Zeng, Kaiyang^*

来源：Materials, 2021, 14(4): 855.

DOI：10.3390/ma14040855

• phase transition
• temperature
• PZN-7%PT
• PFM

The evolution of the domain structures of [001]-oriented relaxor ferroelectric 0.93PbZn(1/3)Nb(2/3)O(3)-0.07PbTiO(3) (PZN-7%PT) single crystals as a function of temperature was investigated in situ by using piezoresponse force microscopy (PFM). It was found that the local domain structure of PZN-7%PT single crystals at room temperature is rhombohedral with nanoscale twins. Temperature-dependent domain structures showed that the phase transition process is a collective process and that the sample underwent a sequence of rhombohedral (R) -> monoclinic (Mc) -> tetragonal (T) -> cubic (C) phase transformations when the temperature increased from 25 degrees C to 170 degrees C. The results provide direct observation of the phase transition evolution of PZN-7%PT single crystals as a function of temperature, which is of great significance to fully understand the relationships between the domain structure and phase structure of PZN-7%PT single crystals.

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