Anomalous Spectroscopical Effects in an Antiferromagnetic Semiconductor: The Case of Magneto-Optical Kerr Effect

Following the recent observation of anomalous Hall effect in antiferromagnetic hexagonal MnTe thin films, related phenomena at finite frequencies have come into focus.Magnetic circular dichroism (MCD) is the key material property here.In the X-ray range, the X-ray MCD has already been demonstrated and used to visualize domains via photoemission electron microscopy.Herein, MCD in optical range is reported on and its microscopic mechanism is discussed.