One-dimensional and spherical polarization analysis of artificially confined spin-density waves in Cr/Sn multilayers

In Cr/Sn(0 0 1) multilayers in which monatomic Sn nonmagnetic layers are periodically embedded, spin-density waves (SDWs) are formed below the Neel temperature like that in bulk Cr. They are, however, quite different to the SDW in bulk Cr. For instance the wavelength of the SDW is defined not simply by the nesting vector of Cr, but also by the artificial periodicity introduced by the Sn layers. We performed the spherical neutron-polarization analysis of these anomalous SDW structures by using CRYOPAD (CRYOgenic Polarization Analysis Device) as well as the one-dimensional polarization analysis in order to get more detailed magnetic structural information which could not be obtained with unpolarized neutron experiments