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dc.contributor.authorYao, Yingbang
dc.contributor.authorLiu, Wenchao
dc.contributor.authorMak, C. L.
dc.date.accessioned2015-08-03T09:47:15Z
dc.date.available2015-08-03T09:47:15Z
dc.date.issued2012-06
dc.identifier.citationYao, Y. B., Liu, W. C., & Mak, C. L. (2012). Pyroelectric properties and electrical conductivity in samarium doped BiFeO3 ceramics. Journal of Alloys and Compounds, 527, 157–162. doi:10.1016/j.jallcom.2012.02.182
dc.identifier.issn09258388
dc.identifier.doi10.1016/j.jallcom.2012.02.182
dc.identifier.urihttp://hdl.handle.net/10754/562206
dc.description.abstractSamarium (Sm 3+) doped BiFeO 3 (BFO) ceramics were prepared by a modified solid-state-reaction method which adopted a rapid heating as well as cooling during the sintering process. The pyroelectric coefficient increased from 93 to 137 μC/m 2 K as the Sm 3+ doping level increased from 1 mol% to 8 mol%. Temperature dependence of the pyroelectric coefficient showed an abrupt decrease above 80 °C in all samples, which was associated with the increase of electrical conductivity with temperature. This electrical conduction was attributed to oxygen vacancy existing in the samples. An activation energy of ∼0.7 eV for the conduction process was found to be irrespective of the Sm 3+ doping level. On the other hand, the magnetic Néel temperature (T N) decreased with increasing Sm 3+ doping level. On the basis of our results, the effects of Sm doping level on the pyroelectric and electrical properties of the BFO were revealed. © 2011 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipThis work was supported by the Hong Kong Polytechnic University under Grant No. GYH08.
dc.publisherElsevier BV
dc.subjectBiFeO 3
dc.subjectPyroelectric
dc.subjectSm 3+ doping
dc.titlePyroelectric properties and electrical conductivity in samarium doped BiFeO 3 ceramics
dc.typeArticle
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Lab
dc.contributor.departmentCore Labs
dc.identifier.journalJournal of Alloys and Compounds
dc.contributor.institutionDepartment of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
dc.contributor.institutionNational Laboratory of Solid State Microstructures, School of Modern Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
kaust.personYao, Yingbang


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