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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
Technical Tags: