Magnetic moments of substitutional gold in silicon

Abstract

The magnetic susceptibility of silicon samples containing isolated gold impurities on substitutional sites in different charge states has been measured using a sensitive Faraday balance. A paramagnetic moment, which could not be detected by electron paramagnetic resonance measurements, was found for the neutral gold impurity Au 0 . There is no evidence for a paramagnetic moment of the charged impurities Au − and Au + . These results are in agreement with a model given by Anderson and Watkins, and with recent measurements of the Zeeman effect and of the magnetic circular dichroism of the absorption.