Abstract

We present two new effects in polarized neutron reflectivity. We show that we have a nonsymmetric spin-flip signal in reflectivity measurements on magnetic films when the external field is not negligible. This phenomenon is due to different Larmor precessions for the two spin states and has to be taken into account in some experiments. The second effect is still not understood, but we present results indicating that the specular reflection on a nonmagnetic surface can induce a neutron beam depolarization or rotation.

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