Thermodynamics of single-domain BaTiO3 and PbTiO3 epitaxial thin films

A phenomenological thermodynamic theory of ferroelectric thin films epitaxially grown on cubic substrates is developed using a new form of the Gibbs function, which corresponds to the actual mechanical boundary conditions of the problem. It is found that the 2D-clamping of the films results not only in a shift of the transition temperature but also in a change of its order. For single-domain BaTiO3 and PbTiO3 films, the "misfit strain-temperature" phase diagram is constructed. For PbTiO3 films, the existence of a phase forbidden for the crystals is predicted. The intrinsic piezoelectric response of BaTiO3 films is calculated as a function of the misfit strain.


Published in:
Journal of the Korean Physical Society, 32, S1457-S1460
Year:
1998
ISSN:
0374-4884
Note:
Tagantsev, AK Ecole Polytech Fed Lausanne, Lab Ceram, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, Lab Ceram, CH-1015 Lausanne, Switzerland AF Ioffe Physicotech Inst, St Petersburg 194021, Russia State Tech Univ St Petersburg, St Petersburg 195251, Russia
Part 4 Suppl. S
Yz023
Times Cited:3
Cited References Count:14
Laboratories:




 Record created 2006-08-21, last modified 2018-03-17


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