Study of Order Parameters Coupling in Uniaxial Ferroelectrics on the Basis of Pyroelectric and Dilatometric Measurements

• Authors: M. Gałązka , P. Zieliński
• Languages of publication: EN

Abstracts

EN

A method is devised of extracting the explicit form of the coupling between the primary and secondary order parameters with the use of experimental data and respecting classical and non-classical values of the effective critical exponents. The corresponding equation of state stems from the Ising model on a compressible lattice treated within the mean field approximation supplemented with terms ascertaining scaling invariance in the vicinity of the critical point. The theory is exemplified by the molecular ferroelectric crystals (CH_{3}NH_{3})_{5}Bi_{2}Cl_{11} (MAPCB) and (CH_{3}NH_{3})_{5}Bi_{2}Br_{11} (MAPBB).

Keywords

EN

64.10.+h; 64.60.Bd; 62.20.dq

Discipline

• 64.10.+h: General theory of equations of state and phase equilibria(see also 05.70.Ce Thermodynamic functions and equations of state)
• 64.60.Bd: General theory of phase transitions
• 62.20.dq: Other elastic constants

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 4
• Pages: 566-569

Dates

published

2010-04

Contributors

author

M. Gałązka

• The H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Cracow, Poland

author

P. Zieliński

• The H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Cracow, Poland
• Institute of Physics, Cracow University of Technology, Podchorążych 1, 30-084 Cracow, Poland

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Identifiers

DOI

10.12693/APhysPolA.117.566