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Ferroelectrics Volume 302, 2004 - Issue 1
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Original Articles

Anomalous Behaviour of the Specific Heat of AB′B″O3 Complex Perovskites at Low Temperatures

S. GVASALIYA Laboratory for Neutron Scattering ETHZ & Paul-Scherrer Institut CH-5232 Villigen PSI, Switzerland and Ioffe Physical Technical Institute, 26, Politechnicheskaya, Russia, 194021
,
S. LUSHNIKOV Ioffe Physical Technical Institute, 26 Politechnicheskaya, St. Petersburg, Russia, 194021
,
Y. MORIYA Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Japan, 226-8503
,
H. KAWAJI Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Japan, 226-8503
,
T. ATAKE Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Japan, 226-8503
,
M. SMIRNOV Fock Institute of Physics Saint-Petersburg University, 194508 Petrodvoretz, St. Petersburg, Russia
&
V. KAZIMIROV University of Virginia Department of Physics, Charlottesville, VA, 22903, USA
 show all
Pages 341-345 | Received 01 Aug 2003, Accepted 01 Jan 2004, Published online: 08 Sep 2010
 
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Abstract

Specific heat of PbMg1/3Nb2/3O3, PbMg1/3Ta2/3O3, and BaMg1/3Ta2/3O3 complex perovskites has been measured from 2 K up to 295 K. At low temperatures a drastic difference of the behaviour of the specific heat of BaMg1/3 Ta2/3O3 with respect to other two compounds was found. Different approaches to describe the specific heat at the low temperatures of the PbMg1/3Nb2/3O3 relaxor ferroelectric are discussed.

Acknowledgement

Work was partially supported by RFBR grant 02–02–17678.

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