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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 ; Wegscheider, Werner
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Date of publication of this fulltext: 21 Sep 2009 07:05


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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