Ferromagnetism in Ga0.90Mn0.10As1-yPy: From the metallic to the impurity band conduction regime
Résumé
The magnetic properties of low temperature MBE grown Ga0.90Mn0.10As1 - yPy films with 00.15 it changes to impurity band conduction (IBC). In the IBC regime the main magnetic properties are profoundly modified: the saturation magnetization decreases from typically 50 emu/cm(3) to 35 emu/cm(3), the critical temperature drops sharply from 130 K to 45 K and the uniaxial magnetic anisotropy spectroscopy is strongly reduced. (C) 2011 Elsevier B.V. All rights reserved.