The field-induced R-T phase transition in PMNT single crystal

Gui-Sheng Xu Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R., China

Hao-Su Luo Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R., China

Hai-Qing Xu Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R., China

Dong-Lin Li Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R., China

Ping-Chu Wang Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R., China

Zhi-Wen Yin Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R., China

Abstract

Field-induced phase transition from rhombohedral to tetragonal phase (R-T phase transition) was observed on the (001)_cub cuts in PMNT64/36 single crystal using polarizing microscope. It was found that the induced T phase with c domains could hold in local regions after removing field. Repeated R-T or T-R phase transition took place while alternating field directions. The coexistence of R and T phases showed the diffuse behavior of induced R-T phase transition and accounted for the fluctuation in piezoelectric properties.

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The field-induced R-T phase transition in PMNT single crystal

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The field-induced R-T phase transition in PMNT single crystal

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