Numéro |
Collection SFN
Volume 7, 2007
Neutrons Polarisés
|
|
---|---|---|
Page(s) | 261 - 288 | |
DOI | https://doi.org/10.1051/sfn:2007026 | |
Publié en ligne | 31 mai 2007 |
DOI: 10.1140/sfn:2007026
Polarimetric neutron scattering
F. TassetInstitut Laue-Langevin, BP. 156, 38042 Grenoble Cedex 9, France
(Published online: 31 May 2007)
Abstract
Beams of spin polarized itinerant neutrons have long been used to map magnetic electrons
in ferromagnetic and paramagnetic materials under an applied field. End of 1960's,
Moon, Riste and Koehler introduce spin resolved neutron scattering at HFIR in Oak-Ridge,
enlarging considerably the field of polarized neutrons. But it is only during the last decade,
with the introduction of the zero-field polarimeter Cryopad at ILL, that the 3 components of
the neutron spin polarization vector are measured independently before and after scattering,
giving the neutron all its strength to uncover complicated antiferromagnetic arrangements.
Our slides ought to introduce the spin polarization vector, the two main neutron
scattering amplitudes, magnetic and nuclear, the high sensitivity which results from their
interference, and the experimental techniques available in Grenoble
for such measurements.
© EDP Sciences 2007