Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 21, Issue 28, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/21/28/285901
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Raman scattering measurements were performed on the ferroelastic compound Rb4LiH3(SO4)(4) to determine the nature of the structural transition observed at T-c = 134 K. A double-grating spectrometer was used to obtain the Raman active B modes of Rb4LiH3(SO4)(4). Back-scattering measurements, as a function of temperature, reveal that the 31 cm(-1) mode shows softening consistent with that of an order parameter. As a result, our investigation indicates that the structural transition in Rb4LiH3(SO4)(4) should be cataloged as a pseudo-proper ferroelastic transition rather than a proper ferroelastic one.
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