Behaviour of NTE material Ag3[Co(CN)6] under pressure
Source
Journal of Physics Conference Series
ISSN
17426588
Date Issued
2012-01-01
Author(s)
Ghalsasi, Pallavi
Poswal, H. K.
Tripathi, Ravi
Garg, Nandini
Deo, M. N.
Sharma, Surinder M.
Abstract
Recent discovery of colossal negative thermal expansion (NTE) behaviour in Silver Hexacyanocobaltate Ag<inf>3</inf>[Co(CN)<inf>6</inf>] has triggered interest among researchers to understand the basic mechanism causing such an unusual behaviour. This report presents our results on the behaviour of Ag <inf>3</inf>[Co(CN)<inf>6</inf>] using in-situ high pressure Raman and FTIR spectroscopy. The reported trigonal-monoclinic phase transition occurring in this compound is observed at 0.2 GPa. Upon increasing the pressure further, Ag<inf>3</inf>[Co(CN)<inf>6</inf>] becomes irreversibly amorphous above 13 GPa.