Journal article
Element specific investigation of ultrathin Co2MnGa/GaAs heterostructures
Magnetic Systems Group, LabChip Section, Department of Micro- and Nanotechnology, Technical University of Denmark1
LabChip Section, Department of Micro- and Nanotechnology, Technical University of Denmark2
Department of Micro- and Nanotechnology, Technical University of Denmark3
Quantum Physics and Information Technology, Department of Physics, Technical University of Denmark4
Department of Physics, Technical University of Denmark5
We have used x-ray magnetic circular dichroism to study the element specific magnetic properties of ultrathin films of the Heusler alloy Co2MnGa at room temperature. Nine films were grown by molecular beam epitaxy on GaAs substrates and engineered to vary in stoichiometry as Co1.86Mn0.99Ga1, Co1.95Mn0.98Ga1, and Co1.97Mn0.96Ga1, with thicknesses of 5.3, 7.6, and 9.7 nm, and were capped with Al to prevent oxidization.
Sum rule analysis revealed magnetic moments significantly lower than the values predicted theoretically, especially in the case of the Mn total magnetic moment. The results do not support the hypothesis that a large magnetic moment is transferred from Co to Mn, and may suggest that diffusion and reacted layers at ultrathin thicknesses can effect the establishment of a full Heusler structure.
| Language: | English |
|---|---|
| Publisher: | American Institute of Physics |
| Year: | 2007 |
| Pages: | 09J506 |
| Proceedings: | 10th JOINT MMM/INTERMAG CONFERENCE |
| ISSN: | 10897550 and 00218979 |
| Types: | Journal article |
| DOI: | 10.1063/1.2712165 |
| ORCIDs: | Damsgaard, Christian Danvad and Hansen, Jørn Bindslev |
