Possible Magnetic Chirality in Optically Chiral Magnet [Cr(CN)6_6][Mn(SS)-pnH(H2_2O)](H2_2O) Probed by Muon Spin Rotation and Relaxation

Local magnetic fields in a molecule-based optically chiral magnet [Cr(CN)$_6$][Mn($S$)-pnH(H$_2$O)](H$_2$O) (GN-S) and its enantiomer (GN-R) are studied by means of muon spin rotation and relaxation (muSR). Detailed analysis of muon precession signals under zero field observed below T_c supports the average magnetic structure suggested by neutron powder diffraction. Moreover, comparison of muSR spectra between GN-S and GN-R suggests that they are a pair of complete optical isomers in terms of both crystallographic and magnetic structure. Possibility of magnetic chirality in such a pair is discussed.Comment: 5 pages, 5 figures, submitted to J. Phys. Soc. Jp

Magneto-dynamics of chiral carbon nanotubes

Carbon nanotubes exist in achiral and chiral forms. The chiral nanotubes exist as two enantiomers which are each others' mirror image. By means of symmetry arguments it can be shown that a magnetic field imparts a linear momentum to the chiral nanotube. Inversely, a moving chiral nanotube generates a magnetic field. In order to quantify the first effect, the chiral nanotube is approximated by the quantum mechanical model of a free electron on a helix. (C) 2004 Elsevier B.V. All rights reserved