1. Secondary magnetic phases in (Ga,Mn)As determined by x-ray magnetic circular dichroism.
- Author
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Edmonds, K. W., Freeman, A. A., Farley, N. R. S., Wang, K. Y., Campion, R. P., Gallagher, B. L., Foxon, C. T., van der Laan, G., and Arenholz, E.
- Subjects
MANGANESE compounds ,GALLIUM arsenide ,FERROMAGNETIC materials ,SEMICONDUCTORS ,DICHROISM ,X-ray spectroscopy ,MAGNETIC fields - Abstract
We have studied the magnetic and electronic properties of (Ga,Mn)As ferromagnetic semiconductor layers containing low concentrations of room temperature magnetic MnAs precipitates, using x-ray magnetic circular dichroism in x-ray absorption spectroscopy. Measurements below and above the Curie temperature of the (Ga,Mn)As show localized multiplet structures and broad metallic-like line shapes, respectively. By applying magnetic fields below the coercivity of the (Ga,Mn)As layer, the magnetization reversal behavior of the ferromagnetic semiconductor and the MnAs precipitates can be resolved and are found to be independent of each other. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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