Brillouin spectroscopy of relaxor ferroelectrics and metal hydrides

Muhtar Ahart; Aravind Asthagiri; R. E. Cohen; Jeffery Yarger; Ho kwang Mao; Russell J. Hemley

doi:10.1016/j.msea.2006.02.224

Brillouin spectroscopy of relaxor ferroelectrics and metal hydrides

Muhtar Ahart, Aravind Asthagiri, R. E. Cohen, Jeffery Yarger, Ho kwang Mao, Russell J. Hemley

Molecular Sciences, School of (SMS)

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

1 Scopus citations

Abstract

A complete set of elastic and piezoelectric constants for single-domain rhombohedral Pb(Zn_1/3Nb_2/3)O₃{single bond}4.5%PbTiO₃ is obtained using Brillouin scattering. The bulk modulus and elastic constants agree with the values obtained from ultrasonic methods, but the piezoelectric constants are smaller. Differences in piezoelectric constants from different techniques are due to frequency dispersion and the contributions of domain boundaries. The pressure dependence of the Brillouin shifts of amorphous BeH₂ was measured from ambient pressure to 17 GPa. The equation of state is deduced from the pressure dependence of the sound velocity; the bulk modulus is 14.2 (±3.0) GPa and its pressure derivative is 5.3 (±0.5).

Original language	English (US)
Pages (from-to)	519-522
Number of pages	4
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	442
Issue number	1-2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.msea.2006.02.224
State	Published - Dec 20 2006

Keywords

Amorphous BeH
Brillouin scattering
Equation of state
Piezoelectricity
Relaxor ferroelectrics

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Brillouin spectroscopy of relaxor ferroelectrics and metal hydrides",

abstract = "A complete set of elastic and piezoelectric constants for single-domain rhombohedral Pb(Zn1/3Nb2/3)O3{single bond}4.5%PbTiO3 is obtained using Brillouin scattering. The bulk modulus and elastic constants agree with the values obtained from ultrasonic methods, but the piezoelectric constants are smaller. Differences in piezoelectric constants from different techniques are due to frequency dispersion and the contributions of domain boundaries. The pressure dependence of the Brillouin shifts of amorphous BeH2 was measured from ambient pressure to 17 GPa. The equation of state is deduced from the pressure dependence of the sound velocity; the bulk modulus is 14.2 (±3.0) GPa and its pressure derivative is 5.3 (±0.5).",

keywords = "Amorphous BeH, Brillouin scattering, Equation of state, Piezoelectricity, Relaxor ferroelectrics",

author = "Muhtar Ahart and Aravind Asthagiri and Cohen, {R. E.} and Jeffery Yarger and Mao, {Ho kwang} and Hemley, {Russell J.}",

note = "Funding Information: This work was sponsored by the Office of Naval Research, Carnegie/Department of Energy Alliance Center (CDAC), the National Science Foundation, the W.M. Keck Foundation.",

year = "2006",

month = dec,

day = "20",

doi = "10.1016/j.msea.2006.02.224",

language = "English (US)",

volume = "442",

pages = "519--522",

journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

issn = "0921-5093",

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TY - JOUR

T1 - Brillouin spectroscopy of relaxor ferroelectrics and metal hydrides

AU - Ahart, Muhtar

AU - Asthagiri, Aravind

AU - Cohen, R. E.

AU - Yarger, Jeffery

AU - Mao, Ho kwang

AU - Hemley, Russell J.

N1 - Funding Information: This work was sponsored by the Office of Naval Research, Carnegie/Department of Energy Alliance Center (CDAC), the National Science Foundation, the W.M. Keck Foundation.

PY - 2006/12/20

Y1 - 2006/12/20

N2 - A complete set of elastic and piezoelectric constants for single-domain rhombohedral Pb(Zn1/3Nb2/3)O3{single bond}4.5%PbTiO3 is obtained using Brillouin scattering. The bulk modulus and elastic constants agree with the values obtained from ultrasonic methods, but the piezoelectric constants are smaller. Differences in piezoelectric constants from different techniques are due to frequency dispersion and the contributions of domain boundaries. The pressure dependence of the Brillouin shifts of amorphous BeH2 was measured from ambient pressure to 17 GPa. The equation of state is deduced from the pressure dependence of the sound velocity; the bulk modulus is 14.2 (±3.0) GPa and its pressure derivative is 5.3 (±0.5).

AB - A complete set of elastic and piezoelectric constants for single-domain rhombohedral Pb(Zn1/3Nb2/3)O3{single bond}4.5%PbTiO3 is obtained using Brillouin scattering. The bulk modulus and elastic constants agree with the values obtained from ultrasonic methods, but the piezoelectric constants are smaller. Differences in piezoelectric constants from different techniques are due to frequency dispersion and the contributions of domain boundaries. The pressure dependence of the Brillouin shifts of amorphous BeH2 was measured from ambient pressure to 17 GPa. The equation of state is deduced from the pressure dependence of the sound velocity; the bulk modulus is 14.2 (±3.0) GPa and its pressure derivative is 5.3 (±0.5).

KW - Amorphous BeH

KW - Brillouin scattering

KW - Equation of state

KW - Piezoelectricity

KW - Relaxor ferroelectrics

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U2 - 10.1016/j.msea.2006.02.224

DO - 10.1016/j.msea.2006.02.224

M3 - Article

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SN - 0921-5093

VL - 442

SP - 519

EP - 522

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

IS - 1-2 SPEC. ISS.

ER -

Brillouin spectroscopy of relaxor ferroelectrics and metal hydrides

Abstract

Keywords

ASJC Scopus subject areas

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