Compression of CdCu3Ti4O12 Perovskite to 55 GPa

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Solid State Communications

DOI:https://doi.org/10.1016/j.ssc.2007.03.022· OSTI ID:930383

Ma, Y; Aksoy, R

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.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 930383
• Report Number(s): BNL--81105-2008-JA
• Journal Information: Solid State Communications, Journal Name: Solid State Communications Journal Issue: 7 Vol. 142; ISSN 0038-1098; ISSN SSCOA4
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ATOMS
COMPRESSION
PERMITTIVITY
PEROVSKITE
PHASE TRANSFORMATIONS
PRESSURE RANGE
SYNCHROTRON RADIATION
X-RAY DIFFRACTION
national synchrotron light source