Far-Infrared and Raman Studies of the Ferroelectric Phase Transition in LiNaGe4O9
1999; Wiley; Volume: 214; Issue: 2 Linguagem: Inglês
10.1002/(sici)1521-3951(199908)214
ISSN1521-3951
AutoresE. Buixaderas, S. Kamba, I. Gregora, P. K., J. Petzelt, Takuya Yamaguchi, M. Wada,
Tópico(s)Liquid Crystal Research Advancements
Resumophysica status solidi (b)Volume 214, Issue 2 p. 441-452 Original Paper Far-Infrared and Raman Studies of the Ferroelectric Phase Transition in LiNaGe4O9 E. Buixaderas, E. Buixaderas Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorS. Kamba, S. Kamba Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorI. Gregora, I. Gregora Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorP. Vaněk, P. Vaněk Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorJ. Petzelt, J. Petzelt Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorT. Yamaguchi, T. Yamaguchi Department of Electrical Engineering, College of Science and Engineering, Meisei University, 2-1-1 Hodokubo, Hino, Tokyo 191-8506, JapanSearch for more papers by this authorM. Wada, M. Wada Department of Physics, Faculty of Science, Shinshu University, 3-1-1 Ashahi, Matsumoto, Nagano 390-0802, JapanSearch for more papers by this author E. Buixaderas, E. Buixaderas Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorS. Kamba, S. Kamba Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorI. Gregora, I. Gregora Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorP. Vaněk, P. Vaněk Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorJ. Petzelt, J. Petzelt Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18040 Prague 8, Czech RepublicSearch for more papers by this authorT. Yamaguchi, T. Yamaguchi Department of Electrical Engineering, College of Science and Engineering, Meisei University, 2-1-1 Hodokubo, Hino, Tokyo 191-8506, JapanSearch for more papers by this authorM. Wada, M. Wada Department of Physics, Faculty of Science, Shinshu University, 3-1-1 Ashahi, Matsumoto, Nagano 390-0802, JapanSearch for more papers by this author First published: 03 August 1999 https://doi.org/10.1002/(SICI)1521-3951(199908)214:2 3.0.CO;2-XCitations: 13AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Polarized far-infrared reflectivity and Raman scattering spectra of LiNaGe4O9 single crystals were studied between 15 and 300 K. Even if the ferroelectric phase transition in this material is of order–disorder type and critical relaxation was estimated from our data in the region 0.13 to 13 cm—1, pronounced phonon softening in four different symmetry spectra was observed near Tc. This indicates changes in interatomic bonds caused by local Li and Na atom ordering and accompanying shifts of GeO polyhedra even above Tc. Phonon anomalies observed about 45 K below Tc in the E ∥ a far-infrared spectra might suggest another phase transition, but no corresponding dielectric anomaly was observed in previous dielectric measurements. Citing Literature Volume214, Issue2August 1999Pages 441-452 RelatedInformation
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