UNIGE document Scientific Article
previous document  unige:3084  next document
add to browser collection

An EPR study of a new low-temperature phase transition in KLiSO4:MoO43-

Ravi Sekhar, Y.
Published in Journal of Physics. C, Solid State Physics. 1988, vol. 21, no. 15, p. 2795-2804
Abstract A new phase transition is observed in the KLiSO4 crystals below 77 K using MoO43- as a paramagnetic probe. The EPR spectra of this molecular ion, which substitutes for the host SO42- ion, show triclinic symmetry at 77 K due to the joint action of a trigonal crystal field and a trigonal Jahn-Teller effect of E(X)e type. Above 77 K, motional averaging in the a-b plane occurs; thereby an axial spectrum is observed. Below 64 K, the two sulphate sites are no longer equivalent resulting in the appearance of two distinct EPR spectra of the molybdate ion. The possible space groups of the crystal in the vicinity of the phase transition are discussed. The authors' results indicate that one needs to distinguish carefully between the local dynamics and the structural changes in this crystal.
Full text
Research group Groupe Bill
(ISO format)
BILL, Hans, RAVI SEKHAR, Y., LOVY, Dominique. An EPR study of a new low-temperature phase transition in KLiSO4:MoO43-. In: Journal of Physics. C, Solid State Physics, 1988, vol. 21, n° 15, p. 2795-2804. https://archive-ouverte.unige.ch/unige:3084

217 hits



Deposited on : 2009-09-21

Export document
Format :
Citation style :