Magnetostructure of MnAs on GaAs revisited

Ernst Bauer (1, 2) , Rachid Belkhou (2, 3) , Salia Cherifi (4) , Andrea Locatelli (2) , A. Pavlovska (1, 2) , Nicolas Rougemaille (4)

1 Department of Physics
2 Synchrotron ELETTRA
3 SSOLEIL - Synchrotron SOLEIL
4 NEEL - MNM - Micro et NanoMagnétisme

The ferromagnetic to nonferromagnetic (α-β) phase transition in epitaxial MnAs layers on GaAs(100) is studied by x-ray magnetic circular dichroism and x-ray magnetic linear dichroism photoemission electron microscopy in order to elucidate the nature of the controversial nonferromagnetic state of β-MnAs. In the coexistence region of the two phases the β phase shows a clear XMLD signal characteristic of antiferromagnetism. The nature and the possible causes of the elusiveness of this magnetic state are discussed.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Ernst Bauer, Rachid Belkhou, Salia Cherifi, Andrea Locatelli, A. Pavlovska, et al.. Magnetostructure of MnAs on GaAs revisited. Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures, 2007, 25 (4), pp.1470. ⟨10.1116/1.2746353⟩. ⟨hal-00193844⟩