Phase transitions and piezoelectricity enhancement around MC → O phase transition in PMN-0.34PT single crystals

Jinhui Fan; Xiaoyan Lu; Wenwu Cao

doi:10.1016/j.jallcom.2020.155171

Phase transitions and piezoelectricity enhancement around MC → O phase transition in PMN-0.34PT single crystals

Jinhui Fan, Xiaoyan Lu, Wenwu Cao

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Phase transitions of Pb(Mg_1/3Nb_2/3)O₃-0.34PbTiO₃ (PMN-0.34 PT) have been studied by using dielectric constant variations, polarization-electric field hysteresis loops, and polarizing light microscopy (PLM). Even without the assistance of electric field, orthorhombic (O) phase exists in the [001]_C-oriented PMN-0.34 PT single crystals during the heating process, which is confirmed by the polarizer/analyzer extinction angle from full-angle in situ PLM observation combined with the grayscale image analysis. The phase transition sequence is monoclinic (M_C) → O → M_C → tetragonal (T) → cubic (C), which is different from the commonly accepted M_C → T → C sequence. The existence of the O phase accompanies with much enhanced dielectric and piezoelectric performance, which indicates a new mechanism to produce large piezoelectricity in PMN-PT single crystals.

Original language	English (US)
Article number	155171
Journal	Journal of Alloys and Compounds
Volume	835
DOIs	https://doi.org/10.1016/j.jallcom.2020.155171
State	Published - Sep 15 2020

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2020.155171

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title = "Phase transitions and piezoelectricity enhancement around MC → O phase transition in PMN-0.34PT single crystals",

abstract = "Phase transitions of Pb(Mg1/3Nb2/3)O3-0.34PbTiO3 (PMN-0.34 PT) have been studied by using dielectric constant variations, polarization-electric field hysteresis loops, and polarizing light microscopy (PLM). Even without the assistance of electric field, orthorhombic (O) phase exists in the [001]C-oriented PMN-0.34 PT single crystals during the heating process, which is confirmed by the polarizer/analyzer extinction angle from full-angle in situ PLM observation combined with the grayscale image analysis. The phase transition sequence is monoclinic (MC) → O → MC → tetragonal (T) → cubic (C), which is different from the commonly accepted MC → T → C sequence. The existence of the O phase accompanies with much enhanced dielectric and piezoelectric performance, which indicates a new mechanism to produce large piezoelectricity in PMN-PT single crystals.",

author = "Jinhui Fan and Xiaoyan Lu and Wenwu Cao",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

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doi = "10.1016/j.jallcom.2020.155171",

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T1 - Phase transitions and piezoelectricity enhancement around MC → O phase transition in PMN-0.34PT single crystals

AU - Fan, Jinhui

AU - Lu, Xiaoyan

AU - Cao, Wenwu

PY - 2020/9/15

Y1 - 2020/9/15

N2 - Phase transitions of Pb(Mg1/3Nb2/3)O3-0.34PbTiO3 (PMN-0.34 PT) have been studied by using dielectric constant variations, polarization-electric field hysteresis loops, and polarizing light microscopy (PLM). Even without the assistance of electric field, orthorhombic (O) phase exists in the [001]C-oriented PMN-0.34 PT single crystals during the heating process, which is confirmed by the polarizer/analyzer extinction angle from full-angle in situ PLM observation combined with the grayscale image analysis. The phase transition sequence is monoclinic (MC) → O → MC → tetragonal (T) → cubic (C), which is different from the commonly accepted MC → T → C sequence. The existence of the O phase accompanies with much enhanced dielectric and piezoelectric performance, which indicates a new mechanism to produce large piezoelectricity in PMN-PT single crystals.

AB - Phase transitions of Pb(Mg1/3Nb2/3)O3-0.34PbTiO3 (PMN-0.34 PT) have been studied by using dielectric constant variations, polarization-electric field hysteresis loops, and polarizing light microscopy (PLM). Even without the assistance of electric field, orthorhombic (O) phase exists in the [001]C-oriented PMN-0.34 PT single crystals during the heating process, which is confirmed by the polarizer/analyzer extinction angle from full-angle in situ PLM observation combined with the grayscale image analysis. The phase transition sequence is monoclinic (MC) → O → MC → tetragonal (T) → cubic (C), which is different from the commonly accepted MC → T → C sequence. The existence of the O phase accompanies with much enhanced dielectric and piezoelectric performance, which indicates a new mechanism to produce large piezoelectricity in PMN-PT single crystals.

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Phase transitions and piezoelectricity enhancement around MC → O phase transition in PMN-0.34PT single crystals

Abstract

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