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Article: Effects of frequency and temperature evolution of polar nanoregions on susceptibility dispersion and polarization mechanism in relaxors

TitleEffects of frequency and temperature evolution of polar nanoregions on susceptibility dispersion and polarization mechanism in relaxors
Authors
KeywordsAnalytical expressions
Characteristic evolution
Coercive field
Cooling devices
Different frequency
Issue Date2011
PublisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
Citation
Journal of Applied Physics, 2011, v. 110 n. 12, article no. 124108 How to Cite?
AbstractA generic theory for the frequency and temperature effects on the characteristic evolution of polar nanoregions (PNRs) is essential for improving and optimizing the design of relaxor-based piezoelectric and electrocaloric cooling devices. Pauli's master equation was used to deduce analytical expressions for both the polarization dynamics and frequency-tunable susceptibility dispersions of relaxors. This was done by coupling the intrinsic equilibrium and dynamic factors of bulk relaxors and thin-films. It has been found that for relaxors to comply with Vogel-Fulcher relation, the evolution of PNR mean volume and coercive field of localized electric hysteresis for PNRs has to obey the classic Merz's switching law. The evolution of PNR mean volume in Pb(Mg 1/3Nb 2/3)O 3 crystal was calculated in the temperature range of 200-300 K and at different frequencies up to 10 12 Hz. Our results were in good agreement with the mean-field percolation theory and experimental correlation lengths. Hence, the proposed theory may serve as a new basis for studying the relationship between macroscopic dielectric, electrocaloric as well as other important properties of relaxors and evolutions of their typical microstructures. © 2011 American Institute of Physics.
Persistent Identifierhttp://hdl.handle.net/10722/157166
ISSN
2015 Impact Factor: 2.101
2015 SCImago Journal Rankings: 0.603
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administrative RegionHKU 717011E
Funding Information:

We would acknowledge the financial support from the Research Grants Council of the Hong Kong Special Administrative Region (Project No. HKU 717011E).

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorShi, YPen_US
dc.contributor.authorSoh, AKen_US
dc.date.accessioned2012-08-08T08:45:37Z-
dc.date.available2012-08-08T08:45:37Z-
dc.date.issued2011en_US
dc.identifier.citationJournal of Applied Physics, 2011, v. 110 n. 12, article no. 124108en_US
dc.identifier.issn0021-8979en_US
dc.identifier.urihttp://hdl.handle.net/10722/157166-
dc.description.abstractA generic theory for the frequency and temperature effects on the characteristic evolution of polar nanoregions (PNRs) is essential for improving and optimizing the design of relaxor-based piezoelectric and electrocaloric cooling devices. Pauli's master equation was used to deduce analytical expressions for both the polarization dynamics and frequency-tunable susceptibility dispersions of relaxors. This was done by coupling the intrinsic equilibrium and dynamic factors of bulk relaxors and thin-films. It has been found that for relaxors to comply with Vogel-Fulcher relation, the evolution of PNR mean volume and coercive field of localized electric hysteresis for PNRs has to obey the classic Merz's switching law. The evolution of PNR mean volume in Pb(Mg 1/3Nb 2/3)O 3 crystal was calculated in the temperature range of 200-300 K and at different frequencies up to 10 12 Hz. Our results were in good agreement with the mean-field percolation theory and experimental correlation lengths. Hence, the proposed theory may serve as a new basis for studying the relationship between macroscopic dielectric, electrocaloric as well as other important properties of relaxors and evolutions of their typical microstructures. © 2011 American Institute of Physics.en_US
dc.languageengen_US
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jspen_US
dc.relation.ispartofJournal of Applied Physicsen_US
dc.rightsJournal of Applied Physics. Copyright © American Institute of Physics.-
dc.rightsCopyright (2011) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in (Journal of Applied Physics, 2011, v. 110 n. 12, article no. 124108) and may be found at (http://jap.aip.org/resource/1/japiau/v110/i12/p124108_s1).-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectAnalytical expressions-
dc.subjectCharacteristic evolution-
dc.subjectCoercive field-
dc.subjectCooling devices-
dc.subjectDifferent frequency-
dc.titleEffects of frequency and temperature evolution of polar nanoregions on susceptibility dispersion and polarization mechanism in relaxorsen_US
dc.typeArticleen_US
dc.identifier.emailSoh, AK: aksoh@hkucc.hku.hken_US
dc.identifier.authoritySoh, AK=rp00170en_US
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1063/1.3671673en_US
dc.identifier.scopuseid_2-s2.0-84855328724en_US
dc.identifier.hkuros200546-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84855328724&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume110en_US
dc.identifier.issue12, article no. 124108en_US
dc.identifier.isiWOS:000298639800091-
dc.publisher.placeUnited Statesen_US
dc.relation.projectMulti-scale investigation of interface dominated multiferroic nanostructures (IDMNS) and exploration of potential applications-
dc.identifier.scopusauthoridSoh, AK=7006795203en_US
dc.identifier.scopusauthoridShi, YP=12345267700en_US

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