Compression of CdCu3Ti4O12 perovskite to 55 GPa

Yanzhang Ma; Resul Aksoy

doi:10.1016/j.ssc.2007.03.022

Compression of CdCu₃Ti₄O₁₂ perovskite to 55 GPa

Yanzhang Ma, Resul Aksoy

Mechanical Engineering

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2 Scopus citations

Abstract

Synchrotron x-ray diffraction measurements of CdCu₃Ti₄O₁₂ (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 CaCu₃Ti₄O₁₂. The derived bulk modulus K_OT of CDCTO is approximately 235±7 GPa with K^′ = 5.1 ± 0.4.

Original language	English
Pages (from-to)	376-379
Number of pages	4
Journal	Solid State Communications
Volume	142
Issue number	7
DOIs	https://doi.org/10.1016/j.ssc.2007.03.022
State	Published - May 2007

Keywords

A. Perovskite
C. X-ray diffraction
D. Dielectric
E. High pressure

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10.1016/j.ssc.2007.03.022

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title = "Compression of CdCu3Ti4O12 perovskite to 55 GPa",

abstract = "Synchrotron x-ray diffraction measurements of CdCu3Ti4O12 (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 CaCu3Ti4O12. The derived bulk modulus KOT of CDCTO is approximately 235±7 GPa with K′ = 5.1 ± 0.4.",

keywords = "A. Perovskite, C. X-ray diffraction, D. Dielectric, E. High pressure",

author = "Yanzhang Ma and Resul Aksoy",

note = "Funding Information: Thanks are due to Drs Jingzhu Hu and Quanzhong Guo for their technical assistance. This work is supported by the Department of Energy (DOE) under agreement number DE-FC03-03NA00144 and the National Science Foundation (NSF) Grant No. DMR-0619215.",

year = "2007",

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doi = "10.1016/j.ssc.2007.03.022",

language = "English",

volume = "142",

pages = "376--379",

journal = "Solid State Communications",

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T1 - Compression of CdCu3Ti4O12 perovskite to 55 GPa

AU - Ma, Yanzhang

AU - Aksoy, Resul

N1 - Funding Information: Thanks are due to Drs Jingzhu Hu and Quanzhong Guo for their technical assistance. This work is supported by the Department of Energy (DOE) under agreement number DE-FC03-03NA00144 and the National Science Foundation (NSF) Grant No. DMR-0619215.

PY - 2007/5

Y1 - 2007/5

N2 - Synchrotron x-ray diffraction measurements of CdCu3Ti4O12 (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 CaCu3Ti4O12. The derived bulk modulus KOT of CDCTO is approximately 235±7 GPa with K′ = 5.1 ± 0.4.

AB - Synchrotron x-ray diffraction measurements of CdCu3Ti4O12 (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 CaCu3Ti4O12. The derived bulk modulus KOT of CDCTO is approximately 235±7 GPa with K′ = 5.1 ± 0.4.

KW - A. Perovskite

KW - C. X-ray diffraction

KW - D. Dielectric

KW - E. High pressure

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U2 - 10.1016/j.ssc.2007.03.022

DO - 10.1016/j.ssc.2007.03.022

M3 - Article

AN - SCOPUS:34247334990

SN - 0038-1098

VL - 142

SP - 376

EP - 379

JO - Solid State Communications

JF - Solid State Communications

IS - 7

ER -

Compression of CdCu₃Ti₄O₁₂ perovskite to 55 GPa

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Keywords

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