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dc.contributorVirginia Tech. Department of Materials Science and Engineeringen_US
dc.contributorVirginia Tech. Department of Geosciencesen_US
dc.contributorChinese Academy of Sciences. Shanghai Institute of Ceramicsen_US
dc.contributor.authorLuo, Liangen_US
dc.contributor.authorGe, Wenweien_US
dc.contributor.authorLi, Jiefangen_US
dc.contributor.authorViehland, Dwight D.en_US
dc.contributor.authorFarley, Charlesen_US
dc.contributor.authorBodnar, Robert J.en_US
dc.contributor.authorZhang, Qinhuien_US
dc.contributor.authorLuo, Haosuen_US
dc.date.accessioned2015-05-21T19:47:20Z
dc.date.available2015-05-21T19:47:20Z
dc.date.issued2011-06-01
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_US
dc.identifier.issn0021-8979en_US
dc.identifier.urihttp://hdl.handle.net/10919/52404
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_US
dc.description.sponsorshipNational Science Foundation (U.S.). Division of Materials Research. Materials World Network - DMR-0806592en_US
dc.description.sponsorshipUnited States. Department of Energy - DE-FG02-07ER46480en_US
dc.description.sponsorshipNational Natural Science Foundation (China) - 50602047en_US
dc.description.sponsorshipShanghai Municipal People's Government - 08JC1420500en_US
dc.format.extent7 pagesen_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.publisherAmerican Institute of Physicsen_US
dc.subjectFerroelectric phase transitionsen_US
dc.subjectCurie pointen_US
dc.subjectPolarizationen_US
dc.subjectCrystal structuresen_US
dc.subjectDielectricsen_US
dc.titleRaman spectroscopic study of Na1/2Bi1/2TiO3-x%BaTiO3 single crystals as a function of temperature and compositionen_US
dc.typeArticleen_US
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/jap/109/11/10.1063/1.3587236en_US
dc.date.accessed2015-04-24en_US
dc.title.serialJournal of Applied Physicsen_US
dc.identifier.doihttps://doi.org/10.1063/1.3587236
dc.type.dcmitypeTexten_US


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