Magnetic and structural properties of MnAs thin films on GaAs(111)B: Influence of the growth temperature

V. Garcia (1) , M. Bibes , B. Vodungbo (1) , Mahmoud Eddrief (1) , Dominique Demaille (1) , Massimiliano Marangolo (1)

1 INSP - Institut des Nanosciences de Paris

The magnetic and structural properties of MnAs thin films grown on GaAs(111)B at different temperatures (160–280 °C) are investigated. A narrow optimum growth temperature window (200–240 °C) is found where the Curie temperature and the room temperature magnetization are maximized. High-resolution x-ray diffraction experiments are performed on the samples showing that the films are epitaxial for a minimum growth temperature of 200 °C. The room temperature fraction of the hexagonal phase is strongly dependent on the growth temperature in agreement with the magnetic properties.

Mots clés: Curie temperature; ferromagnetic materials; magnetic epitaxial layers; magnetisation; manganese compounds; X-ray diffraction

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

V. Garcia, M. Bibes, B. Vodungbo, Mahmoud Eddrief, Dominique Demaille, et al.. Magnetic and structural properties of MnAs thin films on GaAs(111)B: Influence of the growth temperature. Applied Physics Letters, 2008, 92, pp.011905. ⟨10.1063/1.2830012⟩. ⟨hal-00343975⟩