@article {4728,
	title = {Reorientational dynamics of aza-cyclohexadienyl radicals in pyridinium tetrafluoroborate},
	journal = {Physica B-Condensed Matter},
	volume = {289},
	year = {2000},
	note = {ISI Document Delivery No.: 330GBTimes Cited: 8Cited Reference Count: 128th International Conference on Muon Spin Rotation, Relaxation and ResonanceAUG 30-SEP 03, 1999LES DIABLERETS, SWITZERLANDEuropean Phys Soc, Paul Scherrer Inst, Eidgenoss Tech Hochschule, Univ Zurich, European Sci Fdn, Swiss Natl Sci Fdn, Neue Aargauer Bank, Sauerstoffwerk Lenzburg AG, Hamamatsu Photon, EG \& G Berthold GmbH \& Co KG, Prophysik AG, Kroger \& Co, Wenger SA, Alcatel Hochvakuum Tech GmbH, Sunrise AG, Dramer AG, Automobil \& Motoren AG},
	month = {Aug},
	pages = {607-611},
	type = {Proceedings Paper},
	abstract = {{Pyridinium tetrafluoroborate is a ferroelectric with a paraelectric-ferroelectric phase transition of second order, which is exceptional for multidirectional ferroelectrics, Avoided-level-crossing muon-spin resonance has been used to show that the Mu substituted aza-cyclohexadienyl radical derived from the pyridinium ions undergoes fast uniaxial rotation around the axis perpendicular to the molecular plane, confirming earlier results by Czarnecki et al. The changes in reorientational dynamics between 239 and 244 K also verify the existence of a phase transition in this range, as found by Czarnecki. Furthermore, the results give strong evidence that superimposed on the rotation there is a wobbling motion of the rotational axis which freezes in at the first transition temperature},
	keywords = {avoided-level-crossing muon-spin resonance, cyclohexadienyl radical, MAGNETIC-RESONANCE, PHASE-TRANSITION, pyridinium, REORIENTATIONAL DYNAMICS, TETRAFLUOROBORATE, VARIANT},
	isbn = {0921-4526},
	url = {<Go to ISI>://000087953500159},
	author = {Beck, B. and Roduner, E. and Dilger, H. and Czarnecki, P. and Fleming, Donald G. and Reid, I. D. and Rhodes, C. J.}
}
