Large phase fluctuations near TI and phase pinning in incommensurate ThBr4 : Gd3+ through E.S.R. measurements
- 1 January 1984
- journal article
- Published by EDP Sciences in Journal de Physique Lettres
- Vol. 45 (13), 693-700
- https://doi.org/10.1051/jphyslet:019840045013069300
Abstract
Recently, the coexistence of « normal-like » and incommensurate 87 Rb N.M.R. lines have been observed in Rb2ZnBr4 below TI, and has been interpreted in terms of a standing wave regime of phase fluctuations between pinning defects. We analyse a similar effect in the E.P.R. spectra of ThBr4 : Gd3+. We rule out the possibility of an extrinsic pinning effect due to the E.P.R. probe and we show that inhomogeneous phase fluctuations can account for the observation. A crude application of the model developed by Blinc indicates that the average distance between pinning centres is compatible with their being dislocationsKeywords
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