Non-steady-state optothermal electromotive force in relaxor ferroelectrics
Abstract We predict a new non-steady-state optothermal electromotive force effect in relaxor ferroelectrics. The effect is observed and studied in a PbNi $$_{1/3}$$ Ta $$_{2/3}$$ O $$_3$$ crystal at light wavelength $$\lambda =532$$ nm and room temperature, which is significantly above the broad, fr...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.1038/s41598-025-10381-8 |
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| Summary: | Abstract We predict a new non-steady-state optothermal electromotive force effect in relaxor ferroelectrics. The effect is observed and studied in a PbNi $$_{1/3}$$ Ta $$_{2/3}$$ O $$_3$$ crystal at light wavelength $$\lambda =532$$ nm and room temperature, which is significantly above the broad, frequency-dependent maximum of the permittivity ( $$T_m\simeq 89$$ K), below which remanent polarization and the relaxor ferroelectric state arise. We focus on the pronounced mismatch in high-frequency behaviour of the non-steady-state EMF and conductivity response due to nonuniform laser heating and develop the ensuing theory of the effect. |
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| ISSN: | 2045-2322 |