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Lattice dynamics and phase transitions in betaine arsenate

Title
Lattice dynamics and phase transitions in betaine arsenate
Type
Article in International Scientific Journal
Year
2000
Authors
Moreira, JA
(Author)
Other
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Santos, ML
(Author)
FCUP
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Chaves, MR
(Author)
FCUP
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Almeida, A
(Author)
FCUP
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Klopperpieper, A
(Author)
Other
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Gervais, F
(Author)
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Journal
Title: FerroelectricsImported from Authenticus Search for Journal Publications
Vol. 239
Pages: 963-970
ISSN: 0015-0193
Publisher: Taylor & Francis
Scientific classification
FOS: Engineering and technology > Materials engineering
Other information
Authenticus ID: P-001-1G8
Abstract (EN): In this work we present an experimental study of infrared reflectivity spectroscopy in betaine arsenate (BA). The results obtained corroborate the order-disorder character of the phase transition in BA at 120 K, observed by Raman spectroscopy, They also provide a clear evidence of the proton ordering in the hydrogen bonds, associating different ordering temperatures to different bonds orientations. Precursory effects are observed well above 120 K.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 8
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