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Title: Compressional and Shear-Wave Velocities of the Polycrystalline CaGeO3 Perovskite to 10 GPa

Abstract

Compressional and shear-wave velocities and unit-cell volumes of orthorhombic CaGeO{sub 3} perovskite have been measured up to 10GPa at ambient temperature using ultrasonic interferometry in conjunction with synchrotron x radiation. Fitting all velocity and unit-cell volume data to finite-strain equations yields the zero-pressure adiabatic bulk and shear moduli and their pressure derivatives K{sub S0}=194.6 (11)GPa, G{sub 0}=109.5 (5)GPa , KS0'=6.4 (2), G0'=1.7 (1), with an rms misfit of 0.009kms{sup -1} . From the data in the current study, we have observed no discontinuities or elasticity softening for either the bulk or shear moduli up to the peak pressure of 10GPa .

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930496
Report Number(s):
BNL-80431-2008-JA
Journal ID: ISSN 1098-0121; TRN: US0901401
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B: Condensed Matter and Materials Physics; Journal Volume: 75; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; AMBIENT TEMPERATURE; ELASTICITY; INTERFEROMETRY; PEROVSKITE; POLYCRYSTALS; PRESSURE RANGE GIGA PA; SHEAR; SYNCHROTRON RADIATION; ULTRASONIC WAVES; VELOCITY; X RADIATION; national synchrotron light source

Citation Formats

Liu,W., and Li, B.. Compressional and Shear-Wave Velocities of the Polycrystalline CaGeO3 Perovskite to 10 GPa. United States: N. p., 2007. Web. doi:10.1103/PhysRevB.75.024107.
Liu,W., & Li, B.. Compressional and Shear-Wave Velocities of the Polycrystalline CaGeO3 Perovskite to 10 GPa. United States. doi:10.1103/PhysRevB.75.024107.
Liu,W., and Li, B.. Mon . "Compressional and Shear-Wave Velocities of the Polycrystalline CaGeO3 Perovskite to 10 GPa". United States. doi:10.1103/PhysRevB.75.024107.
@article{osti_930496,
title = {Compressional and Shear-Wave Velocities of the Polycrystalline CaGeO3 Perovskite to 10 GPa},
author = {Liu,W. and Li, B.},
abstractNote = {Compressional and shear-wave velocities and unit-cell volumes of orthorhombic CaGeO{sub 3} perovskite have been measured up to 10GPa at ambient temperature using ultrasonic interferometry in conjunction with synchrotron x radiation. Fitting all velocity and unit-cell volume data to finite-strain equations yields the zero-pressure adiabatic bulk and shear moduli and their pressure derivatives K{sub S0}=194.6 (11)GPa, G{sub 0}=109.5 (5)GPa , KS0'=6.4 (2), G0'=1.7 (1), with an rms misfit of 0.009kms{sup -1} . From the data in the current study, we have observed no discontinuities or elasticity softening for either the bulk or shear moduli up to the peak pressure of 10GPa .},
doi = {10.1103/PhysRevB.75.024107},
journal = {Physical Review B: Condensed Matter and Materials Physics},
number = 2,
volume = 75,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}