Raman spectroscopic study of Na1/2Bi1/2TiO3-x%BaTiO3 single crystals as a function of temperature and composition

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dc.contributorVirginia Tech. Department of Materials Science and Engineeringen
dc.contributorVirginia Tech. Department of Geosciencesen
dc.contributorChinese Academy of Sciences. Shanghai Institute of Ceramicsen
dc.contributor.authorLuo, Liangen
dc.contributor.authorGe, Wenweien
dc.contributor.authorLi, Jiefangen
dc.contributor.authorViehland, Dwight D.en
dc.contributor.authorFarley, Charlesen
dc.contributor.authorBodnar, Robert J.en
dc.contributor.authorZhang, Qinhuien
dc.contributor.authorLuo, Haosuen
dc.contributor.departmentMaterials Science and Engineering (MSE)en
dc.date.accessed2015-04-24en
dc.date.accessioned2015-05-21T19:47:20Zen
dc.date.available2015-05-21T19:47:20Zen
dc.date.issued2011-06-01en
dc.description.abstractA Raman spectroscopic study of Na1/2Bi1/2TiO3-x%BaTiO3 (NBT-x%BT) single crystals with x=0 and 5.6 has been performed as a function of temperature from 25 to 600 degrees C. The general features of the Raman spectra for the various compositions were similar over the region of the phase diagram investigated, with only subtle changes between rhombohedral (R), tetragonal (T) and cubic phases. The peaks were broad, with no significant narrowing on cooling through a phase transition. We find evidence of an oxygen octahedral rotational mode in the paraelectric state. On cooling near and below the ferroelectric Curie temperature, a gradual change in intensity of the A-O and B-O peaks occurred with decreasing temperature. Evidence of a ferroelectric -> antiferroelectric transition was found near 200-250 degrees C, consistent with the onset of dispersion in the dielectric constant. The phase transition mechanism was discussed. The findings indicate the presence of a broad distribution of quasistatic local structural distortions, which only have subtle differences in the various average structures. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3587236]en
dc.description.sponsorshipNational Science Foundation (U.S.). Division of Materials Research. Materials World Network - DMR-0806592en
dc.description.sponsorshipUnited States. Department of Energy - DE-FG02-07ER46480en
dc.description.sponsorshipNational Natural Science Foundation (China) - 50602047en
dc.description.sponsorshipShanghai Municipal People's Government - 08JC1420500en
dc.format.extent7 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLuo, Liang, Ge, Wenwei, Li, Jiefang, Viehland, D., Farley, Charles, Bodnar, Robert, Zhang, Qinhui, Luo, Haosu (2011). Raman spectroscopic study of Na1/2Bi1/2TiO3-x%BaTiO3 single crystals as a function of temperature and composition. Journal of Applied Physics, 109(11). doi: 10.1063/1.3587236en
dc.identifier.doihttps://doi.org/10.1063/1.3587236en
dc.identifier.issn0021-8979en
dc.identifier.urihttp://hdl.handle.net/10919/52404en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/jap/109/11/10.1063/1.3587236en
dc.language.isoen_USen
dc.publisherAmerican Institute of Physicsen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectFerroelectric phase transitionsen
dc.subjectCurie pointen
dc.subjectPolarizationen
dc.subjectCrystal structuresen
dc.subjectDielectricsen
dc.titleRaman spectroscopic study of Na1/2Bi1/2TiO3-x%BaTiO3 single crystals as a function of temperature and compositionen
dc.title.serialJournal of Applied Physicsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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