Ferromagnetic Resonance Study of Exchange Coupled (Ga,Mn)As/GaAs/(Ga,Mn)As Heterostructures

K. Dziatkowski a, Z. Ge b, X. Liu b, J.K. Furdyna b, B. Clerjaud c and A. Twardowski a a Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland b Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA c Institute des NanoSciences de Paris, 75015 Paris and France Université Pierre et Marie Curie, 75005 Paris, France

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Received: 9 06 2007;

Ferromagnetic resonance study of the exchange coupled (Ga,Mn)As/ GaAs/(Ga,Mn)As heterostructures is reported. The measurements were performed on the series of samples with varying thicknesses dGaAs of nonmagnetic GaAs spacer, established dGaAs-dependent extent of weak and strong interlayer exchange coupling, judging on the observation of one or two ferromagnetic resonance modes.

DOI: 10.12693/APhysPolA.112.227 PACS numbers: 75.50.Pp, 76.50.+g, 75.70.Cn, 75.30.Et, 85.75.-d