Thermodynamic theory of epitaxial ferroelectric thin films with dense domain structures

By V. G. Koukhar, N. Pertsev, Rainer Waser. 2001

216 citations recorded by the source corpus.

A Landau-Ginsburg-Devonshire-type nonlinear phenomenological theory is presented, which enables the thermodynamic description of dense laminar polydomain states in epitaxial ferroelectric thin films. The theory explicitly takes into account the mechanical substrate effect on the polarizations and lattice strains in dissimilar elastic domains (twins). Numerical calculations are performed for ${\mathrm{PbTiO}}_{3}$ and ${\mathrm{BaTiO}}_{3}$ films grown on (001)-oriented cubic substrates. The ``misfit strain-temperature'' phase diagrams are developed for these films, showing stability ranges of various possible polydomain and single-domain states. Three types of polarization instabilities are revealed for polydomain epitaxial ferroelectric films, which may lead to the formation of new polydomain states forbidden in bulk crystals. The total dielectric and piezoelectric small-signal responses of polydomain films are calculated, resulting from both the volume and domain-wall contributions. For ${\mathrm{BaTiO}}_{3}$ films, strong dielectric anomalies are predicted at room temperature near special values of the misfit strain.

Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/f812fc8daf6a1326c84ac8ee9759693df6a11eb8

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In Biomedical Engineering

1. K. Rabe
2. J. Scott
3. M. Dawber
4. J. Triscone
5. Darrell Schlom
6. C. Eom
7. Long-qing Chen
8. Ingo Steinbach

In Electrical and Electronic Engineering

1. K. Rabe
2. J. Scott
3. M. Dawber
4. C. Eom
5. Long-qing Chen
6. Darrell Schlom
7. John Robertson

In Materials Chemistry

1. K. Rabe
2. J. Scott
3. Darrell Schlom
4. J. Triscone
5. Long-qing Chen
6. M. Dawber
7. C. Eom
8. S. Streiffer

Citations in the corpus

• Strain Tuning of Ferroelectric Thin Films (2007, background): “These include (001)p-oriented PbTiO3 (15, 16, 18, 19), BaTiO3 (15, 21, 22, 78), and Pb(ZrxTi1−x)O3 (81a, 81b) as well as (001)p SrTiO3 (17, 20, 21), which is not normally ferroelectric but can become ferroelectric when strained; the subscript p refers to the pseudocubic index.”
• Physics of thin-film ferroelectric oxides (2005, methodology): “Phenomenological analysis based on Landau-Devonshire theory for a number of perovskite oxides has been presented by Pertsev and co-workers (Koukhar et al., 2001; Pertsev et al., 2003, 2000a,b, 1998, 1999), with temperature-strain diagrams for BaTiO3, PbTiO3 (see Fig.”