Crystal structure of the ferroelectric phase of (BP)(0.08)(BPI)(0.92)

• Type: Article in International Scientific Journal
• Date: 1999

Authors

Andrade, LCR (Author) Other; Santos, ML (Author) FCUP; Silvestre, J (Author) Other; Costa, MMR (Author) Other; Chaves, MR (Author) FCUP; Almeida, A (Author) FCUP; Klopperpieper, A (Author) Other

Journal

Title: Physica Status Solidi (B): Basic Research

Vol. 215

Pages: 975-986

ISSN: 0370-1972

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 3 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-001-38N

Abstract (EN): We have determined the structure of (BP)(00.8)(BPI)(0.92) both in the ferrodistortive (at approximate to 294 K) and in the ferroelectric (at approximate to 146 K) phases, by single crystal X-ray diffraction measurements. A detailed comparison between the structures revealed small but significant structural distortions, consisting almost exclusively of rotations which evidence the order-disorder nature of protons in the bonds linking neighbouring molecules in the chains and confirm the increase of the hybridization of the orbitals of the O-H valence electrons in these bonds upon cooling. These observations suggest that the proton ordering may be, if not the only contribution to the macroscopic polarization, at least the mechanism triggering the para-ferroelectric phase transition in (BP)(0.08)(BPI)(0.92).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12