21 research outputs found
Possible Magnetic Chirality in Optically Chiral Magnet [Cr(CN)][Mn()-pnH(HO)](HO) Probed by Muon Spin Rotation and Relaxation
Local magnetic fields in a molecule-based optically chiral magnet
[Cr(CN)][Mn()-pnH(HO)](HO) (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