1. Center for Spinelectronic Materials and Devices, Bielefeld University, NRW 33501 Bielefeld, Germany
2. Infineon Technologies, BY 85579 Neubiberg, Germany
3. Infineon Technologies, BY 93049 Regensburg, Germany
4. Infineon Technologies, K 9500 Villach, Austria
5. Department for Integrated Sensor Systems, Danube University Krems, NÖ 2700 Wiener Neustadt, Austria