Dynamics of the first single Grandjean-Cano line in cholesterics under weak applied magnetic fields

G. Malet , J. Marignan , O. Parodi

Experimental results and theoretical analysis of the dynamics of the first Grandjean-Cano line under a weak applied magnetic field are presented here. The dissipative process is essentially due to the director reorientation following the line motion. We therefore give a detailed study of the director configuration around the line, starting from de Gennes planar model. The dynamics of the line is then analysed and compares well with the experimental results. A macroscopic disclination core radius (≃ 0,5 μ) is deduced from this comparison.

Mots clés: disclinations; liquid crystals

Domaines: Articles anciens

G. Malet, J. Marignan, O. Parodi. Dynamics of the first single Grandjean-Cano line in cholesterics under weak applied magnetic fields. Journal de Physique, 1976, 37 (7-8), pp.865-882. ⟨10.1051/jphys:01976003707-8086500⟩. ⟨jpa-00208482⟩