MAGNETIC-MOMENTS OF SUBSTITUTIONAL GOLD IN SILICON

The magnetic susceptibility of silicon samples containing isolated gol d impurities on substitutional sites in different charge states has be en measured using a sensitive Faraday balance. A paramagnetic moment, which could not be detected by electron paramagnetic resonance measure ments, was found for the neutral gold impurity Au-0. There is no evide nce for a paramagnetic moment of the charged impurities Au- and Au+. T hese results are in agreement with a model given by Anderson and Watki ns, and with recent measurements of the Zeeman effect and of the magne tic circular dichroism of the absorption.