Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/1921
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dc.contributor.authorDe, Chandan
dc.contributor.authorGhara, Somnath
dc.contributor.authorSundaresan, A.
dc.date.accessioned2016-10-28T05:59:48Z-
dc.date.available2016-10-28T05:59:48Z-
dc.date.issued2015
dc.identifier.citationSolid State Communicationsen_US
dc.identifier.citation205en_US
dc.identifier.citationDe, C.; Ghara, S.; Sundaresan, A., Effect of internal electric field on ferroelectric polarization in multiferroic TbMnO3. Solid State Communications 2015, 205, 61-65.en_US
dc.identifier.issn0038-1098
dc.identifier.urihttp://hdl.handle.net/10572/1921-
dc.descriptionRestricted accessen_US
dc.description.abstractPyro-current measurements have been widely used to study ferroelectric properties in multiferroic materials. However, determination of intrinsic polarization by this method is not straightforward because of leakage current and trapped charge carriers. Here, we demonstrate the formation of internal electric field due to thermally stimulated charge carriers and its influence on ferroelectric polarization in a polycrystalline sample of the well-known multiferroic TbMnO3. While an electric field (E-ext) poling across the ferroelectric transition (T-c similar to 26 K) is essential to obtain depolarization current at T-c, the sample poled only in the paraelectric state (T-pole=130-50 K) also exhibits a pyro-current peak at T-c but with the same polarity (-I-pyro) as that of the external field (-E-ext). We demonstrate that these unusual behavior of pyro-current are caused by a positive internal electric field (+E-int) which in turn are created by thermally stimulated free charge carriers during the poling process in the paraelectric state. We also show that a combination of DC-biased current and pyro-current measurements is a promising method to study the intrinsic ferroelectric properties in multiferroic materials. (C) 2015 Elsevier Ltd. All rights reserved.en_US
dc.description.uri1879-2766en_US
dc.description.urihttp://dx.doi.org/10.1016/j.ssc.2015.01.002en_US
dc.language.isoEnglishen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.rights?Pergamon-Elsevier Science Ltd, 2015en_US
dc.subjectCondensed Matter Physicsen_US
dc.subjectOxideen_US
dc.subjectMultiferroicen_US
dc.subjectFerroelectricityen_US
dc.subjectPyroelectric currenten_US
dc.subjectLuFe2O4en_US
dc.subjectAbsenceen_US
dc.subjectBiFeO3en_US
dc.subjectOrderen_US
dc.subjectSalten_US
dc.titleEffect of internal electric field on ferroelectric polarization in multiferroic TbMnO3en_US
dc.typeArticleen_US
Appears in Collections:Research Articles (Sundaresan A.)

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