Depth dependence of the Mn valence and Mn-Mn coupling in (Ga,Mn)N

DOI: 10.1103/PhysRevB.76.081201

Authors: A. A. Freeman (University of Nottingham) , K. W. Edmonds (University of Nottingham) , N. R. S. Farley (University of Nottingham; Daresbury Laboratory) , S. V. Novikov (University of Nottingham) , R. P. Campion (University of Nottingham) , C. T. Foxon (University of Nottingham) , B. L. Gallagher (University of Nottingham) , E. Sarigiannidou (CEA-Grenoble) , G. Van Der Laan (Daresbury Laboratory; Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 76 (8)

State: Published (Approved)
Published: August 2007

Abstract: We report an x-ray absorption and x-ray magnetic circular dichroism study of the dilute magnetic semiconductor (Ga,Mn)N. Two distinct components are observed in the Mn L(2,3) spectra, with a ratio that depends on sample properties. From comparisons of measurements obtained with different detection modes and under different magnetic fields, we ascribe the two components to, respectively, (i) bulk-incorporated Mn in a hybridized d(4)-d(5) configuration, which is weakly ferromagnetically coupled; and (ii) Mn incorporated within a surface depletion layer, in a paramagnetic d(5) configuration

Diamond Keywords: Ferromagnetism

Subject Areas: Physics, Materials

Facility: ID08 at ESRF

Added On: 01/08/2010 08:27

Discipline Tags:

Quantum Materials Physics Magnetism Materials Science

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