Anomalous magnetic properties and Hall effect in ferromagnetic Co2MnAl epilayers

Chen, Y. J.; Basiaga, D.; O'Brien, J. R.; Heiman, D.
May 2004
Applied Physics Letters;5/24/2004, Vol. 84 Issue 21, p4301
Academic Journal
Epitaxial films of the full Heusler alloy Co2MnAl were grown on GaAs substrates by molecular-beam epitaxy. The close lattice matching and similar structure to GaAs make this material a good candidate for a spin injector. Magnetization measurements reveal complex ferromagnetic transitions near the Curie point at TC≃800 K. At room temperature, magnetotransport studies show metallic behavior and a giant Hall effect driven by the extraordinary Hall effect. © 2004 American Institute of Physics.


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