Low temperature behaviour of betaine phosphate-betaine arsenate mixed crystals

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Almeida, A (Author) FCUP; Sarmento, S (Author) Other; Ribeiro, JL (Author) Other; Vieira, LG (Author) Other; Chaves, MR (Author) Other; Klopperpieper, A (Author) Other

Journal

Title: Integrated Ferroelectrics

Vol. 63

Pages: 143-148

ISSN: 1058-4587

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-000-CYR

DOI: 10.1080/10584580490459279

Abstract (EN): The mixed system of betaine arsenate and betaine phosphate (BP),(BA)I-x displays, at low temperatures, dielectric anomalies that have been tentatively associated to re-entrant glass phases. In this work, we report results obtained for the composition x = 0.52. The temperature dependence of the complex dielectric constant, polarization hysteresis loops and pyroelectric currents reported prove that an effective ergodicity breaking occurs in the antiferroelectric phase and show that this phase is destabilized at low temperatures. There is also evidence for a high internal bias field, in the whole temperature range studied. Infrared and Raman spectroscopy indicate that the various dielectric anomalies observed reflect structural transformations.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6