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Exchange interactions between magnetic ions and free carriers in ZnMnO: An electron paramagnetic resonance analysis

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6 Author(s)
Ben Mahmoud, A. ; Laboratoire LaPhyMNE, Faculté des Sciences de Gabès, 6079 Gabès, Tunisia ; von Bardeleben, H.J. ; Cantin, J.L. ; Chikoidze, E.
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The magnetic interactions in n-type conductive Zn0.66Mn0.34O thin films with carrier concentrations of 2×1018 cm-3 have been investigated by X-band electron paramagnetic resonance (EPR) technique. We observe exclusively a single exchange narrowed Mn related EPR spectrum characterized by antiferromagnetic exchange interactions. The presence of free carriers modifies the EPR spectra by shifting the resonance fields to lower values. The shift can be modeled by the carrier polarization induced local magnetic field.

Published in:

Journal of Applied Physics  (Volume:101 ,  Issue: 9 )

Date of Publication:

May 2007

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