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dc.contributorVirginia Tech. Department of Materials Science and Engineering. Center for Energy Harvesting Materials and Systems (CEHMS)en_US
dc.contributorChiang Mai University. Department of Physics and Materials Scienceen_US
dc.contributorSuranaree University of Technology. School of Physics. Institute of Scienceen_US
dc.contributor.authorMaurya, Deepamen_US
dc.contributor.authorWongdamnern, Natthapongen_US
dc.contributor.authorYimnirun, Rattikornen_US
dc.contributor.authorPriya, Shashanken_US
dc.date.accessioned2015-05-21T19:47:28Z
dc.date.available2015-05-21T19:47:28Z
dc.date.issued2010-12-15
dc.identifier.citationMaurya, Deepam, Wongdamnern, Natthapong, Yimnirun, Rattikorn, Priya, Shashank (2010). Dielectric and ferroelectric response of compositionally graded bilayer and trilayer composites of BaTiO3 and 0.975BaTiO(3)-0.025Ba(Cu1/3Nb2/3)O-3. Journal of Applied Physics, 108(12). doi: 10.1063/1.3514125en_US
dc.identifier.issn0021-8979en_US
dc.identifier.urihttp://hdl.handle.net/10919/52455
dc.description.abstractIn this paper, we report the dielectric and ferroelectric response of compositionally graded bilayer and trilayer composites consisting of BaTiO3 (BT) and 0.975BaTiO(3)-0.025Ba(Cu1/3Nb2/3)O-3 (BTBCN). Two types of graded bilayer samples were synthesized, one with same thickness of BT and BTBCN while other with different layer thicknesses. The graded trilayer sample consisted of BT layer sandwiched between two BTBCN layers of equal thickness. Scanning electron microscopy and transmission electron microscopy images showed a sharp interface with needle-shape domains across the interface. The domain size on BT side was found to be larger than that on BTBCN side. The temperature dependence of dielectric response for all composite systems was found to exhibit shifting in characteristic Curie peak compared to constituent material which was associated to coupling between layers. Moreover, the differences in grain size, tetragonality, domain mobility of each layer was found to perturb the electrical response of composite. The polarization mismatch between uncoupled BT and BTBCN established internal electric field in composite specimen and defined new polarization states in each layer by perturbing free energy functional of the composite specimen. Dynamic hysteresis behaviors and power-law scaling relations of all specimens were determined from polarization-electric field hysteresis loop measurements as a function of frequency. All systems were found to exhibit similar dynamic scaling relationships. Hysteresis area < A >, P-r, and E-C decreased with increasing frequency due to delayed response but increased with increasing applied electric field due to enhancement of driving force. Trilayer system was found to exhibit strong internal-bias field and double hysteresis behavior. The coupling effect resulting due to polarization mismatch between layers had substantial influence on the dynamic hysteresis behavior and power-law scaling relations. (C) 2010 American Institute of Physics. [doi:10.1063/1.3514125]en_US
dc.description.sponsorshipNational Science Foundation (U.S.). Division of Materials Research. Materials World Networken_US
dc.description.sponsorshipUnited States. Department of Energy. Office of Basic Energy Sciences - Contract No. DE-FG02–07ER46480en_US
dc.format.extent11 pagesen_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.publisherAmerican Institute of Physicsen_US
dc.subjectPolarizationen_US
dc.subjectMultilayersen_US
dc.subjectElectrical hysteresisen_US
dc.subjectCoercive forceen_US
dc.subjectElectric fieldsen_US
dc.titleDielectric and ferroelectric response of compositionally graded bilayer and trilayer composites of BaTiO3 and 0.975BaTiO(3) 0.025Ba(Cu1/3Nb2/3)O-3en_US
dc.typeArticle - Refereeden_US
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/jap/108/12/10.1063/1.3514125en_US
dc.date.accessed2015-04-24en_US
dc.title.serialJournal of Applied Physicsen_US
dc.identifier.doihttps://doi.org/10.1063/1.3514125
dc.type.dcmitypeTexten_US


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