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Raman Spectroscopic Study of the Antiferroelectric Phase Transition in the Layered Squaric Acid (H2C4O4)
- Authors
- Lee, Kwang-Sei; Seo, Jeong-Ah; Hwang, Yoon-Hwae; Kim, Hyung Kook; Lee, Cheol Eui; Nishiyama, Kusuo
- Issue Date
- 2월-2009
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Squaric acid; H2C4O4; Antiferroelectric phase transition; Raman spectra; Internal symmetry
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.54, no.2, pp.853 - 857
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 54
- Number
- 2
- Start Page
- 853
- End Page
- 857
- ISSN
- 0374-4884
- Abstract
- Raman spectra of polycrystalline squaric acid (H2C4O4) were measured in the frequency shift region of 150 - 4000 cm(-1) below and above the anti ferro electric phase transition (T-c = 373 K). No marked changes of internal vibrations of the H2C4O4 molecule in the crystal were observed tip to 473 K, indicating that the symmetry of the H2C4O4 in the antiferroelectric phase persisted to the paraelectric phase.
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