Abstract
Coherent electron-spin dynamics in has been investigated by time-resolved Kerr rotation spectroscopy. The effective electron factor shows a linear increase with the Mn concentration due to the s-d exchange coupling between the conduction electrons and the -shell electrons of impurities. The magnitude and sign of the s-d exchange constant are determined precisely to be , indicative of a ferromagnetic s-d exchange coupling in GaMnN. The determined is consistent with the typical value found in most diluted magnetic semiconductors and reveals that GaMnN is indeed not an exception.
- Received 9 September 2013
- Revised 25 August 2014
DOI:https://doi.org/10.1103/PhysRevB.90.125205
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