| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Mechanism of the Pyroelectric Response under Direct-Current Bias in La-Modified Lead Zirconate Titanate Stannate Ceramics |
| ZHANG Hong-Ling1, WANG Gen-Shui1, CHEN Xue-Feng1, CAO Fei1, DONG Xian-Lin1**, GU Yan2, HE Hong-Liang2, LIU Yu-Sheng2
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1Key laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
2National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, P.O. Box 919-102, Mianyang 621900
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| Cite this article: |
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ZHANG Hong-Ling, WANG Gen-Shui, CHEN Xue-Feng et al 2011 Chin. Phys. Lett. 28 097701 |
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Abstract Dielectric and pyroelectric properties of Pb0.97La0.02(Zr0.42Sn0.40Ti0.18)O3 ceramics are investigated as functions of temperature and dc bias field. Induced and intrinsic pyroelectric coefficients pind and p0 are calculated and analyzed. It is found that the sign, value and variation of the net pyroelectric coefficient p with increasing dc bias all are dominated by p0 under applied biases. Polarization and depolarization processes under dc biases are analyzed. Besides the contribution of pind, the diffuse and decreased pyroelectric response under dc bias compared with that of an identical field poled sample without dc bias is mainly attributed to the depolarization process under dc bias.
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| Keywords:
77.70.+a
77.84.-s
77.22.Ej
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Received: 05 March 2011
Published: 30 August 2011
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| PACS: |
77.70.+a
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(Pyroelectric and electrocaloric effects)
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77.84.-s
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(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
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77.22.Ej
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(Polarization and depolarization)
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