Pressure dependence of the monoclinic phase in (1–x)Pb(Mg1/3Nb2/3)O3-xPbTiO₃ solid solutions
Abstract
We combine high-pressure x-ray diffraction, high-pressure Raman scattering, and optical microscopy to investigate a series of (1–x)Pb(Mg1/3Nb2/3)O3-xPbTiO₃ (PMN-xPT) solid solutions (x=0.2, 0.3, 0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The Raman spectra show a peak centered at 380 cm⁻¹ starting above 6 GPa for all samples, in agreement with previous observations. X-ray diffraction measurements are consistent with this spectral change indicating a structural phase transition; we find that the triplet at the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our results indicate that the morphotropic phase boundary region (x=0.33–0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The pressure dependence of ferroelectric domains in PMN-0.32PT single crystals was observed using a polarizing optical microscope. The domain wall density decreases with pressure and the domains disappear at a modest pressure of 3 GPa. We propose a pressure-composition phase diagram for PMN-xPT solid solutions.
- Authors:
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1102591
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Volume: 86 Journal Issue: 22; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Ahart, Muhtar, Sinogeikin, Stanislav, Shebanova, Olga, Ikuta, Daijo, Ye, Zuo-Guang, Mao, Ho-kwang, Cohen, R. E., and Hemley, Russell J. Pressure dependence of the monoclinic phase in (1–x)Pb(Mg1/3Nb2/3)O3-xPbTiO₃ solid solutions. United States: N. p., 2012.
Web. doi:10.1103/PhysRevB.86.224111.
Ahart, Muhtar, Sinogeikin, Stanislav, Shebanova, Olga, Ikuta, Daijo, Ye, Zuo-Guang, Mao, Ho-kwang, Cohen, R. E., & Hemley, Russell J. Pressure dependence of the monoclinic phase in (1–x)Pb(Mg1/3Nb2/3)O3-xPbTiO₃ solid solutions. United States. https://doi.org/10.1103/PhysRevB.86.224111
Ahart, Muhtar, Sinogeikin, Stanislav, Shebanova, Olga, Ikuta, Daijo, Ye, Zuo-Guang, Mao, Ho-kwang, Cohen, R. E., and Hemley, Russell J. Wed .
"Pressure dependence of the monoclinic phase in (1–x)Pb(Mg1/3Nb2/3)O3-xPbTiO₃ solid solutions". United States. https://doi.org/10.1103/PhysRevB.86.224111.
@article{osti_1102591,
title = {Pressure dependence of the monoclinic phase in (1–x)Pb(Mg1/3Nb2/3)O3-xPbTiO₃ solid solutions},
author = {Ahart, Muhtar and Sinogeikin, Stanislav and Shebanova, Olga and Ikuta, Daijo and Ye, Zuo-Guang and Mao, Ho-kwang and Cohen, R. E. and Hemley, Russell J.},
abstractNote = {We combine high-pressure x-ray diffraction, high-pressure Raman scattering, and optical microscopy to investigate a series of (1–x)Pb(Mg1/3Nb2/3)O3-xPbTiO₃ (PMN-xPT) solid solutions (x=0.2, 0.3, 0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The Raman spectra show a peak centered at 380 cm⁻¹ starting above 6 GPa for all samples, in agreement with previous observations. X-ray diffraction measurements are consistent with this spectral change indicating a structural phase transition; we find that the triplet at the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our results indicate that the morphotropic phase boundary region (x=0.33–0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The pressure dependence of ferroelectric domains in PMN-0.32PT single crystals was observed using a polarizing optical microscope. The domain wall density decreases with pressure and the domains disappear at a modest pressure of 3 GPa. We propose a pressure-composition phase diagram for PMN-xPT solid solutions.},
doi = {10.1103/PhysRevB.86.224111},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 22,
volume = 86,
place = {United States},
year = {Wed Dec 26 00:00:00 EST 2012},
month = {Wed Dec 26 00:00:00 EST 2012}
}
https://doi.org/10.1103/PhysRevB.86.224111
Web of Science
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