Journal
PHYSICAL REVIEW MATERIALS
Volume 6, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.6.L091403
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Funding
- Luxembourgish National Research Fund [INTER/ANR/16/11562984/EXPAND, C16/MS/11348912, FNR-PRIDE/15/10935404]
- Luxembourgish National Research Fund [PRIDE/17/12246511/PACE]
- Operational Programme Research, Development, and Education
- European Structural and Investment Funds and by the Czech Ministry of Education, Youth, and Sports [SOLID21-CZ.02.1.01/0.0/0.0/16_019/0000760]
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This study investigates the effect of field-induced phase transition on birefringence change in PbZr0.95Ti0.05O3. By using a polycrystalline PbZr0.95Ti0.05O3 film with interdigitated electrodes, changes in birefringence under a polarized microscope were observed. The film in its polar phase behaves like a homogeneous birefringent medium. The change in birefringence has both a fast response and a slower saturation contribution.
The most characteristic functional property of antiferroelectric materials is the possibility to induce a phase transition from a nonpolar to a polar phase by an electric field. Here, we investigate the effect of this field-induced phase transition on the birefringence change of PbZr0.95Ti0.05O3. We use a transparent polycrystalline PbZr0.95Ti0.05O3 film grown on PbTiO3/HfO2/SiO2 with interdigitated electrodes to directly investigate changes in birefringence in a simple transmission geometry. In spite of the polycrystalline nature of the film and its moderate thickness, the field-induced transition produces a sizable effect observable under a polarized microscope. The film in its polar phase is found to behave like a homogeneous birefringent medium. The time evolution of this field-induced birefringence provides information about irreversibilities in the antiferroelectric switching process and its slow dynamics. The change in birefringence has two main contributions: One that responds briskly and a slower one that rises and saturates over a period of as long as 30 min. Possible origins for this long saturation and relaxation times are discussed.
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