Phase diagram of the relaxor ferroelectric (1 - x)Pb(Mg1/3Nb2/3)O-3+xPbTiO(3) revisited: a neutron powder diffraction study of the relaxor skin effect

D. Phelan; E. E. Rodriguez; J. Gao; Y. Bing; Z-G Ye; Q. Huang; Jinsheng Wen; Guangyong Xu; C. Stock; M. Matsuura; P. M. Gehring

doi:10.1080/01411594.2014.989226

Phase diagram of the relaxor ferroelectric (1 - x)Pb(Mg1/3Nb2/3)O-3+xPbTiO(3) revisited: a neutron powder diffraction study of the relaxor skin effect

D. Phelan, E. E. Rodriguez, J. Gao, Y. Bing, Z-G Ye, Q. Huang, Jinsheng Wen, Guangyong Xu, C. Stock, M. Matsuura, P. M. Gehring^*

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract / Description of output

We revisit the phase diagram of the relaxor ferroelectric PMN-

[GRAPHICS]

PT using neutron powder diffraction to test suggestions that residual oxygen vacancies and/or strain affect the ground state crystal structure. Powdered samples of PMN-

[GRAPHICS]

PT were prepared with nominal compositions of

[GRAPHICS]

, 0.20, 0.30, and 0.40 and divided into two identical sets, one of which was annealed in air to relieve grinding-induced strain and to promote an ideal oxygen stoichiometry. For a given composition and temperature the same structural phase is observed for each specimen. However, the distortions in all of the annealed samples are smaller than those in the as-prepared samples. Further, the diffraction patterns for

[GRAPHICS]

, 0.20, and 0.30 are best refined using the monoclinic

[GRAPHICS]

space group. By comparing our neutron diffraction results to those obtained on single crystals having similar compositions, we conclude that the relaxor skin effect in PMN-

[GRAPHICS]

PT vanishes on the Ti-rich side of the morphotropic phase boundary.

Original language	English
Pages (from-to)	283-305
Number of pages	23
Journal	Phase transitions
Volume	88
Issue number	3
Early online date	19 Jan 2015
DOIs	https://doi.org/10.1080/01411594.2014.989226
Publication status	Published - 4 Mar 2015

Keywords / Materials (for Non-textual outputs)

phase diagram
morphotropic phase boundary
skin effect
PMN
neutron diffraction
relaxors
X-RAY-DIFFRACTION
FIELD ISING-MODEL
LONG-RANGE ORDER
2ND LENGTH SCALE
SINGLE-CRYSTALS
CUBIC PHASE
SCATTERING
TRANSITION
DEPENDENCE
STRAIN

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10.1080/01411594.2014.989226

http://www.tandfonline.com/doi/abs/10.1080/01411594.2014.989226#.ViYyxH6rSUk

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Phelan, D., Rodriguez, E. E., Gao, J., Bing, Y., Ye, Z-G., Huang, Q., Wen, J., Xu, G., Stock, C., Matsuura, M., & Gehring, P. M. (2015). Phase diagram of the relaxor ferroelectric (1 - x)Pb(Mg1/3Nb2/3)O-3+xPbTiO(3) revisited: a neutron powder diffraction study of the relaxor skin effect. Phase transitions, 88(3), 283-305. Advance online publication. https://doi.org/10.1080/01411594.2014.989226

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title = "Phase diagram of the relaxor ferroelectric (1 - x)Pb(Mg1/3Nb2/3)O-3+xPbTiO(3) revisited: a neutron powder diffraction study of the relaxor skin effect",

abstract = "We revisit the phase diagram of the relaxor ferroelectric PMN-[GRAPHICS]PT using neutron powder diffraction to test suggestions that residual oxygen vacancies and/or strain affect the ground state crystal structure. Powdered samples of PMN-[GRAPHICS]PT were prepared with nominal compositions of[GRAPHICS], 0.20, 0.30, and 0.40 and divided into two identical sets, one of which was annealed in air to relieve grinding-induced strain and to promote an ideal oxygen stoichiometry. For a given composition and temperature the same structural phase is observed for each specimen. However, the distortions in all of the annealed samples are smaller than those in the as-prepared samples. Further, the diffraction patterns for[GRAPHICS], 0.20, and 0.30 are best refined using the monoclinic[GRAPHICS]space group. By comparing our neutron diffraction results to those obtained on single crystals having similar compositions, we conclude that the relaxor skin effect in PMN-[GRAPHICS]PT vanishes on the Ti-rich side of the morphotropic phase boundary.",

keywords = "phase diagram, morphotropic phase boundary, skin effect, PMN, neutron diffraction, relaxors, X-RAY-DIFFRACTION, FIELD ISING-MODEL, LONG-RANGE ORDER, 2ND LENGTH SCALE, SINGLE-CRYSTALS, CUBIC PHASE, SCATTERING, TRANSITION, DEPENDENCE, STRAIN",

author = "D. Phelan and Rodriguez, {E. E.} and J. Gao and Y. Bing and Z-G Ye and Q. Huang and Jinsheng Wen and Guangyong Xu and C. Stock and M. Matsuura and Gehring, {P. M.}",

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T1 - Phase diagram of the relaxor ferroelectric (1 - x)Pb(Mg1/3Nb2/3)O-3+xPbTiO(3) revisited

T2 - a neutron powder diffraction study of the relaxor skin effect

AU - Phelan, D.

AU - Rodriguez, E. E.

AU - Gao, J.

AU - Bing, Y.

AU - Ye, Z-G

AU - Huang, Q.

AU - Wen, Jinsheng

AU - Xu, Guangyong

AU - Stock, C.

AU - Matsuura, M.

AU - Gehring, P. M.

PY - 2015/3/4

Y1 - 2015/3/4

N2 - We revisit the phase diagram of the relaxor ferroelectric PMN-[GRAPHICS]PT using neutron powder diffraction to test suggestions that residual oxygen vacancies and/or strain affect the ground state crystal structure. Powdered samples of PMN-[GRAPHICS]PT were prepared with nominal compositions of[GRAPHICS], 0.20, 0.30, and 0.40 and divided into two identical sets, one of which was annealed in air to relieve grinding-induced strain and to promote an ideal oxygen stoichiometry. For a given composition and temperature the same structural phase is observed for each specimen. However, the distortions in all of the annealed samples are smaller than those in the as-prepared samples. Further, the diffraction patterns for[GRAPHICS], 0.20, and 0.30 are best refined using the monoclinic[GRAPHICS]space group. By comparing our neutron diffraction results to those obtained on single crystals having similar compositions, we conclude that the relaxor skin effect in PMN-[GRAPHICS]PT vanishes on the Ti-rich side of the morphotropic phase boundary.

AB - We revisit the phase diagram of the relaxor ferroelectric PMN-[GRAPHICS]PT using neutron powder diffraction to test suggestions that residual oxygen vacancies and/or strain affect the ground state crystal structure. Powdered samples of PMN-[GRAPHICS]PT were prepared with nominal compositions of[GRAPHICS], 0.20, 0.30, and 0.40 and divided into two identical sets, one of which was annealed in air to relieve grinding-induced strain and to promote an ideal oxygen stoichiometry. For a given composition and temperature the same structural phase is observed for each specimen. However, the distortions in all of the annealed samples are smaller than those in the as-prepared samples. Further, the diffraction patterns for[GRAPHICS], 0.20, and 0.30 are best refined using the monoclinic[GRAPHICS]space group. By comparing our neutron diffraction results to those obtained on single crystals having similar compositions, we conclude that the relaxor skin effect in PMN-[GRAPHICS]PT vanishes on the Ti-rich side of the morphotropic phase boundary.

KW - phase diagram

KW - morphotropic phase boundary

KW - skin effect

KW - PMN

KW - neutron diffraction

KW - relaxors

KW - X-RAY-DIFFRACTION

KW - FIELD ISING-MODEL

KW - LONG-RANGE ORDER

KW - 2ND LENGTH SCALE

KW - SINGLE-CRYSTALS

KW - CUBIC PHASE

KW - SCATTERING

KW - TRANSITION

KW - DEPENDENCE

KW - STRAIN

U2 - 10.1080/01411594.2014.989226

DO - 10.1080/01411594.2014.989226

M3 - Article

SN - 0141-1594

VL - 88

SP - 283

EP - 305

JO - Phase transitions

JF - Phase transitions

IS - 3

ER -

Phase diagram of the relaxor ferroelectric (1 - x)Pb(Mg1/3Nb2/3)O-3+xPbTiO(3) revisited: a neutron powder diffraction study of the relaxor skin effect

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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