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Title: Fragile phase stability in (1-x)Pb(Mg{sub 1/3}Nb{sub 2/3}O{sub 3})-xPbTiO{sub 3} crystals: A comparison of [001] and [110] field-cooled phase diagrams

Abstract

Phase diagrams of [001] and [110] field-cooled (FC) (1-x)Pb(Mg{sub 1/3}Nb{sub 2/3}O{sub 3})-xPbTiO{sub 3} or PMN-xPT (0.15{<=}x{<=}0.38) crystals have been constructed, based on high-resolution x-ray diffraction data. Comparisons reveal several interesting findings. First, a region of abnormal thermal expansion (c{ne}a) above the dielectric maximum was found, whose stability range extended to higher temperatures on application of electric field (E). Second, the rhombohedral (R) phase of the zero-field-cooled (ZFC) state was replaced by monoclinic M{sub A} in the [001] FC diagram, but with monoclinic M{sub B} in the [110] FC. Third, the monoclinic M{sub C} phase in the ZFC and [001] FC diagram was replaced by an orthorhombic (O) phase in the [110] FC diagram. Finally, in the [001] FC diagram, the phase boundary between tetragonal (T) and M{sub A} phases was extended to lower PT content (x=0.25); whereas in the [110] FC diagram, this extended region was entirely replaced by the O phase. These results clearly demonstrate that the phase stability of PMN-xPT crystals is quite fragile--depending not only on modest changes in E, but also on the direction along which E is applied.

Authors:
; ; ;  [1]
  1. Department of Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24061 (United States)
Publication Date:
OSTI Identifier:
20788171
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 73; Journal Issue: 18; Other Information: DOI: 10.1103/PhysRevB.73.184110; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; CONCENTRATION RATIO; CRYSTALS; ELECTRIC FIELDS; FERROELECTRIC MATERIALS; LEAD COMPOUNDS; MAGNESIUM COMPOUNDS; MONOCLINIC LATTICES; NIOBIUM COMPOUNDS; ORTHORHOMBIC LATTICES; PHASE DIAGRAMS; PHASE STABILITY; PHASE TRANSFORMATIONS; THERMAL EXPANSION; TITANATES; X-RAY DIFFRACTION

Citation Formats

Cao, Hu, Li, Jiefang, Viehland, D, Xu, Guangyong, and Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973. Fragile phase stability in (1-x)Pb(Mg{sub 1/3}Nb{sub 2/3}O{sub 3})-xPbTiO{sub 3} crystals: A comparison of [001] and [110] field-cooled phase diagrams. United States: N. p., 2006. Web. doi:10.1103/PHYSREVB.73.1.
Cao, Hu, Li, Jiefang, Viehland, D, Xu, Guangyong, & Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973. Fragile phase stability in (1-x)Pb(Mg{sub 1/3}Nb{sub 2/3}O{sub 3})-xPbTiO{sub 3} crystals: A comparison of [001] and [110] field-cooled phase diagrams. United States. https://doi.org/10.1103/PHYSREVB.73.1
Cao, Hu, Li, Jiefang, Viehland, D, Xu, Guangyong, and Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973. 2006. "Fragile phase stability in (1-x)Pb(Mg{sub 1/3}Nb{sub 2/3}O{sub 3})-xPbTiO{sub 3} crystals: A comparison of [001] and [110] field-cooled phase diagrams". United States. https://doi.org/10.1103/PHYSREVB.73.1.
@article{osti_20788171,
title = {Fragile phase stability in (1-x)Pb(Mg{sub 1/3}Nb{sub 2/3}O{sub 3})-xPbTiO{sub 3} crystals: A comparison of [001] and [110] field-cooled phase diagrams},
author = {Cao, Hu and Li, Jiefang and Viehland, D and Xu, Guangyong and Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973},
abstractNote = {Phase diagrams of [001] and [110] field-cooled (FC) (1-x)Pb(Mg{sub 1/3}Nb{sub 2/3}O{sub 3})-xPbTiO{sub 3} or PMN-xPT (0.15{<=}x{<=}0.38) crystals have been constructed, based on high-resolution x-ray diffraction data. Comparisons reveal several interesting findings. First, a region of abnormal thermal expansion (c{ne}a) above the dielectric maximum was found, whose stability range extended to higher temperatures on application of electric field (E). Second, the rhombohedral (R) phase of the zero-field-cooled (ZFC) state was replaced by monoclinic M{sub A} in the [001] FC diagram, but with monoclinic M{sub B} in the [110] FC. Third, the monoclinic M{sub C} phase in the ZFC and [001] FC diagram was replaced by an orthorhombic (O) phase in the [110] FC diagram. Finally, in the [001] FC diagram, the phase boundary between tetragonal (T) and M{sub A} phases was extended to lower PT content (x=0.25); whereas in the [110] FC diagram, this extended region was entirely replaced by the O phase. These results clearly demonstrate that the phase stability of PMN-xPT crystals is quite fragile--depending not only on modest changes in E, but also on the direction along which E is applied.},
doi = {10.1103/PHYSREVB.73.1},
url = {https://www.osti.gov/biblio/20788171}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 18,
volume = 73,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2006},
month = {Mon May 01 00:00:00 EDT 2006}
}