Phase transitions in single crystals of proustite Ag3AsS3

Autor:	K. N. R. Taylor, S. R. Yang
Rok vydání:	1991
Předmět:	Phase transition Condensed matter physics Chemistry Band gap business.industry Polarization (waves) Ferroelectricity Ion Optics Proustite Absorption edge Attenuation coefficient General Materials Science business Instrumentation
Zdroj:	Phase Transitions. 36:233-256
ISSN:	1029-0338 0141-1594
DOI:	10.1080/01411599108203443
Popis:	The previous work on the topic of phase transitions in proustite is briefly reviewed. Study on the fundamental absorption edge related optical properties of proustite is reported, which reveals anomalies in the average absorption coefficient, band gap energy and polarization shift at temperatures near 210 K. These anomalies together with the abnormal photodielectric behaviour observed in this study provide conclusive evidence for the existence of the photoinduced broad phase change near 210 K. The nature of this photoinduced phase change is assumed to be a displacive type ferroelectric phase transition with a relative displacement of the two sublattices resulting from the redistribution of silver ions under the action of illumination and cooling near to the phase transition temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6b5015fbeb772665947e41080064f634 https://doi.org/10.1080/01411599108203443 Zobrazit plný text záznamu