On the T-s anomaly in betaine calcium chloride dihydrate (BCCD)

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

Authors

Ribeiro, JL (Author) Other; Hernandez, O (Author) Other; Vieira, LG (Author) Other; Thuery, P (Author) Other; Chaves, MR (Author) FCUP; Almeida, A (Author) FCUP; Klopperpieper, A (Author) Other

Journal

Title: Ferroelectrics

Vol. 270

Pages: 1531-1536

ISSN: 0015-0193

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 0 Citations

Other information

Authenticus ID: P-000-R5J

DOI: 10.1080/00150190211208

Abstract (EN): In this work we study the structure of the fourfold phase in a 2% brominated BCCD sample, above and below the so-called "strange anomaly" at T-s approximate to 93 K, in order to confirm the structural modification predicted by Neubert et al . on the basis of the Double Ising Spin model. The "internal transition" predicted by this model would correspond to a first order, symmetry conserving phase transition, that preserves the wavenumber of the commensurate phase and is characterized by a discontinuous increase of the symmetrized components of the structural modulation. The experimental results reported herein do not corroborate the quantitative predictions of the model.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6