Low Temperature Physics: 33, 927 (2007); https://doi.org/10.1063/1.2747067 (4 pages)
Физика Низких Температур: Том 33, Выпуск 11 (Ноябрь 2007), c. 1222-1226    ( к оглавлению , назад )

Exchange broadening of EPR line in ZnO:Co

P. Sati1, V. Pashchenko2, and A. Stepanov1

1Laboratoire Matériaux et Microélectronique de Provence, Case-142 Universitй Paul Cézanne and CNRS, 13397, Marseille Cedex 20, France
E-mail: anatoli.stepanov@L2MP.fr

2Physikalisches Institut, Johann Wolfgang Goethe Universitдt, 1 Max-von-Laue-Strasse Frankfurt am Main 60438 , Germany

Received March 3, 2007


We study the X-band EPR spectra of Co2+ in single crystalline Zn1-xCoxO (x = 0.001–0.075) thin films grown by plasma-assisted molecular beam epitaxy. By analyzing the EPR linewidth behavior we argue that the exchange-narrowing model, usually applied to Mn-based II-VI DMS, fails here and that a combined effect of exchange and dipolar broadening can explain the linewidth variation with Co content and temperature.

PACS: 76.30.Fc Iron group (3d) ions and impurities (Ti–Cu).

Ключевые слова: electron paramagnetic resonance, diluted magnetic semiconductors.