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

DOI: 10.1103/PhysRevB.76.081201

Authors: A. Freeman (University of Nottingham, U.K.) , K. Edmonds (University of Nottingham, U.K.) , N.r.s. Farley (University of Nottingham, U.K.) , S.v. Novikov (University of Nottingham, U.K.) , R.p. Campion (University of Nottingham, U.K.) , C.t. Foxon (University of Nottingham, U.K.) , B.l. Gallagher (University of Nottingham, U.K.) , E. Sarigiannidou (CEA Grenoble, France) , G Van Der Laan (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

Subject Areas: Physics

Facility: ESRF