LOW-TEMPERATURE PHASE-TRANSITIONS IN (NH4)(3)H(SEO4)(2) SINGLE-CRYSTAL STUDIED BY ESR OF SEO3- RADICALS

Authors
AUGUSTYNIAK MA HOFFMANN SK GOSLAR J HILCZER W
Citation
Ma. Augustyniak et al., LOW-TEMPERATURE PHASE-TRANSITIONS IN (NH4)(3)H(SEO4)(2) SINGLE-CRYSTAL STUDIED BY ESR OF SEO3- RADICALS, Phase transitions, 54(4), 1995, pp. 211-225
Citations number
25
Categorie Soggetti
Crystallography,"Physics, Condensed Matter
Journal title
Phase transitions → ACNP
ISSN journal
01411594
Volume
54
Issue
4
Year of publication
1995
Part
A
Pages
211 - 225
Database
ISI
SICI code
0141-1594(1995)54:4<211:LPI(S>2.0.ZU;2-Z
Abstract
Esr studies of SeO3- radicals produced by X-ray irradiation in (NH4)(3 )H(SeO4)(2) Single crystal were performed in the temperature range 4.2 -320 K for crystal phases II-VI. The detailed analysis of ESR spectra and their parameters were performed. It was found that a crucial role in the successive phase transitions and ferroelectric ordering in the phase V plays the temperature dependent dynamics of the NH4 group.