6th International Workshop on Polarised Neutrons in Condensed Matter Investigations location:Berlin, GERMANY date:25-28 sept 2006
We performed polarized neutron reflectometry (PNR) experiments on a 29 nm thick Au93Fe7 film in a temperature range from 295 K down to 2 K in a vertical magnetic field up to 6 T. These high-field experiments were performed on the C5 spectrometer in Chalk River, Canada, using a split-pair cryomagnet. The magnetization as determined by PNR can be described with a Brillouin function from 295 K down to 50 K assuming the magnetic moment of isolated Fe atoms, i.e. 4 mu(B) per Fe atom. Below 50 K the onset of the spin-glass freezing is observed as a strong deviation from this Brillouin type behavior of isolated atoms. Crown Copyright (c) 2007 Published by Elsevier B.V. All rights reserved.