### Session H41: Dielectric, Ferroelectric, and Piezoelectric Oxides I

11:15 AM–2:15 PM, Tuesday, March 14, 2006
Baltimore Convention Center Room: 344

Chair: Eugene Tsiper, Naval Research Laboratory

Abstract ID: BAPS.2006.MAR.H41.11

### Abstract: H41.00011 : Dielectric Relaxation of CaCu$_3$Ti$_4$O$_{12}$ synthesized from a pyrolysis method

1:15 PM–1:27 PM

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#### Authors:

Jianjun Liu
W. N. Mei
(Department of Physics, University of Nebraska at Omaha, Omaha, Nebraska 68182-0266)

R. W. Smith
(Department of Chemistry, University of Nebraska at Omaha, Omaha, Nebraska 68182-0109)

J. R. Hardy
(Department of Physics and Center for Electro-Optics, University of Nebraska, Lincoln, Nebraska 68588-0111)

Giant dielectric constant material CaCu$_3$Ti$_4$O$_{12}$ has been synthesized by using a pyrolysis method. A stable solution was made by dissolving calcium nitrate, copper nitrate, and titanium isopropoxide in 2-methoxyethanol; the solution was then heated at 500 and 700 $^o$C for 2 hours to obtain a pure phase of CaCu$_3$Ti$_4$O$_{12}$. The frequency and temperature dependences of dielectric permittivity were examined in the ranges of 10$^{-1}$$\sim$10$^{6}$ Hz and -150$\sim$200 $^o$C. We found that the dielectric properties of the sample were the same as those made from solid state reaction. Specifically, there is a Debye-like relaxation at low temperature and its giant dielectric constant about 11000 is independent of the temperature and frequency over a wide range.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2006.MAR.H41.11