Incommensurate Intermodulation of an Organic Intergrowth Compound Observed by Neutron Scattering

R. Lefort (1) , J. Etrillard (1) , B. Toudic (1) , F. Guillaume (2) , T. Breczewski (3) , P. Bourges (4)

1 IPR - Institut de Physique de Rennes
2 laboratoire de spectroscopie moléculaire et cristalline
3 facultad de ciencias de bilbao
4 LLB - UMR 12 - Laboratoire Léon Brillouin

The observation of an incommensurate diffraction pattern in urea inclusion compounds by neutron diffraction is reported. It reveals for the first time in these compounds the existence of all kinds of reflections expected for an intermodulated composite. The superspace analysis together with the temperature evolution of some characteristic reflections are presented.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

R. Lefort, J. Etrillard, B. Toudic, F. Guillaume, T. Breczewski, et al.. Incommensurate Intermodulation of an Organic Intergrowth Compound Observed by Neutron Scattering. Physical Review Letters, 1996, 77 (19), pp.4027--4030. ⟨10.1103/PhysRevLett.77.4027⟩. ⟨hal-01009275⟩