Effect of Uniaxial Pressure on the Ferroelectric Phase Transition in Pb_5Ge_3O_{11}:Ba Crystals

• Authors: A. Molak , M. Koralewski , G. Saunders , W. Juszczyk
• Languages of publication: EN

Abstracts

EN

The effect of uniaxial pressure up to 1 kbar applied perpendicular and parallel to c-axis, on the Curie temperature and electric permittivityε_c of Ba-doped Pb_5Ge_3O_{11} single crystals was investigated. The Curie temperature decreases with uniaxial pressure and the coefficientγ_i (γ_i ≡ δ T_{c}/δ X_i) is determined as -7 and -11 K kbar^{-1} for the b- and c-axes, respectively. It was found that uniaxial pressure increases the phase transition diffuseness and the tricritical point cannot be achieved for this pyroelectric and ferroelectric single crystal.

Keywords

EN

77.80.Bh; 77.84.Bw

Discipline

• 77.84.Bw: Elements, oxides, nitrides, borides, carbides, chalcogenides, etc.

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 3
• Pages: 513-520

Dates

published

2005-09

received

2005-03-29

Contributors

author

A. Molak

• Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

author

M. Koralewski

• Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

G. Saunders

• Department of Physics, University of Bath, Claverton Down, Bath, Bath, BA2 7AY England

author

W. Juszczyk

• Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

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Identifiers

DOI

10.12693/APhysPolA.108.513