Magnetic anisotropy of MnAs-films on GaAS(001) studied with ferromagnetic resonance

Journal article

Thin films of MnAs grown on GaAs(001) show a self-organized structure of coexisting ferromagnetic α- and paramagnetic β-MnAs stripes in the temperature interval from 10 to 40°C. We quantify the magnetic anisotropies of the α-stripes via ferromagnetic resonance and superconducting quantum interference device magnetometry for samples with thicknesses of 57 and 165nm. The easy axis of magnetization is found to be located perpendicular to the stripe direction, whereas the direction parallel to the stripes is a hard one. While the intrinsic anisotropies show a bulk-like behavior and explain the direction of the hard axis, the key to understanding the direction of the easy axis is given by the demagnetizing fields due to the stripe formation. © 2003 Elsevier B.V. All rights reserved.

Authors: Lindner, J; Tolinski, T; Lenz, K; Kosubek, E; Wende, H

• Publication status: Published
• Journal: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
• Volume: 277
• Issue: 1-2
• Pages: 159-164
• Publication date: 2004-06-01
• DOI: 10.1016/j.jmmm.2003.10.021
• ISSN: 0304-8853
• Language: English
• Keywords: thin film magnetism; ferromagnetic resonance; manganese arsenide