Broadband electrical detection of spin excitations in Ga0.98Mn0.02As using a photovoltage technique

Wirthmann, André, Hui, Xiong, Mecking, N., Gui, Y. S., Chakraborty, T., Hu, C. M., Reinwald, Matthias, Schüller, Christian und Wegscheider, Werner (2008) Broadband electrical detection of spin excitations in Ga0.98Mn0.02As using a photovoltage technique. Applied Physics Letters 92, S. 232106.

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Zusammenfassung

We report on microwave photovoltage and simultaneous magnetotransport measurements in a Ga, Mn As film oriented normal to the magnetic field. We detect the ferromagnetic resonance over a broad frequency range of 2–18.5 GHz and determine the spectroscopic g-factor and separate the Gilbert from the inhomogeneous contribution to magnetization relaxation. Temperature dependent measurements below the ...

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