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Title: Compression of CdCu3Ti4O12 Perovskite to 55 GPa

Abstract

Synchrotron x-ray diffraction measurements of CdCu{sub 3}Ti{sub 4}O{sub 12} (CDCTO) were performed up to 55.5 GPa. There is no structural phase transformation in this pressure range. The irregular curvature shifts of the P V curve are attributed to the grain surface effect. Analysis indicates that the grain surface of CDCTO is stiffer than the grain interior at higher pressures. We point out that the atoms on grain surfaces must be either densely packed or have a strong correlation with the gain interior in order to have a high dielectric constant, as in CaCu{sub 3}Ti{sub 4}O{sub 12}. The derived bulk modulus K of CDCTO is approximately 235 {+-} 7 GPa with K = 5.1 {+-} 0.4.

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930383
Report Number(s):
BNL-81105-2008-JA
Journal ID: ISSN 0038-1098; SSCOA4; TRN: US0901379
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Solid State Communications; Journal Volume: 142; Journal Issue: 7
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ATOMS; COMPRESSION; PERMITTIVITY; PEROVSKITE; PHASE TRANSFORMATIONS; PRESSURE RANGE; SYNCHROTRON RADIATION; X-RAY DIFFRACTION; national synchrotron light source

Citation Formats

Ma,Y., and Aksoy, R. Compression of CdCu3Ti4O12 Perovskite to 55 GPa. United States: N. p., 2007. Web. doi:10.1016/j.ssc.2007.03.022.
Ma,Y., & Aksoy, R. Compression of CdCu3Ti4O12 Perovskite to 55 GPa. United States. doi:10.1016/j.ssc.2007.03.022.
Ma,Y., and Aksoy, R. Mon . "Compression of CdCu3Ti4O12 Perovskite to 55 GPa". United States. doi:10.1016/j.ssc.2007.03.022.
@article{osti_930383,
title = {Compression of CdCu3Ti4O12 Perovskite to 55 GPa},
author = {Ma,Y. and Aksoy, R.},
abstractNote = {Synchrotron x-ray diffraction measurements of CdCu{sub 3}Ti{sub 4}O{sub 12} (CDCTO) were performed up to 55.5 GPa. There is no structural phase transformation in this pressure range. The irregular curvature shifts of the P V curve are attributed to the grain surface effect. Analysis indicates that the grain surface of CDCTO is stiffer than the grain interior at higher pressures. We point out that the atoms on grain surfaces must be either densely packed or have a strong correlation with the gain interior in order to have a high dielectric constant, as in CaCu{sub 3}Ti{sub 4}O{sub 12}. The derived bulk modulus K of CDCTO is approximately 235 {+-} 7 GPa with K = 5.1 {+-} 0.4.},
doi = {10.1016/j.ssc.2007.03.022},
journal = {Solid State Communications},
number = 7,
volume = 142,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}