Lattice dynamics and phase transitions in strongly deuterated betaine arsenate

• Type: Article in International Scientific Journal
• Date: 2002

Authors

Moreira, JA (Author) FCUP; Chaves, MR (Author) FCUP; Almeida, A (Author) FCUP; Kiopperpieper, A (Author) Other; Gervais, F (Author) Other

Journal

Title: Ferroelectrics

Vol. 272

Pages: 2037-2042

ISSN: 0015-0193

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 0 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-000-R5B

DOI: 10.1080/713716270

Abstract (EN): We report a detailed experimental study of infrared reflectivity and Raman spectroscopies in strongly deuterated betaine arsenate: BA(0.08)DBA(0.92). The temperature dependence of the frequency of the hydrogen bonds stretching modes shows a different critical behaviour for the different types of hydrogen bonds. At 163 K, there is evidence for the proton ordering in the shorter hydrogen bond. A progressive softening of the dynamical central peak revelead some aspects of an order-disorder mechanism.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6