Spatially resolved inhomogeneous ferromagnetism in (Ga,Mn)as diluted magnetic semiconductors: a microscopic study by muon spin relaxation.
Thin epitaxial films of the diluted magnetic semiconductor (DMS) GaMnAs have been studied by low energy muon spin rotation and relaxation (LE-microSR) as well as by transport and magnetization measurement techniques. LE-microSR allows measurements of the distribution of magnetic field on the nanometer scale inaccessible to traditional macroscopic techniques. The spatial inhomogeneity of the magnetic field is resolved: although homogeneous above Tc, below Tc the DMS consists of ferromagnetic and paramagnetic regions of comparable volumes. In the ferromagnetic regions the local field inhomogeneity amounts to 0.03 T.
Storchak
Vyacheslav G
VG
Russian Research Centre Kurchatov Institute, Kurchatov Square 1, Moscow 123182, Russia. storchak@stor.polyn.kiae.su
Eshchenko
Dmitry G
DG
Morenzoni
Elvezio
E
Prokscha
Thomas
T
Suter
Andreas
A
Liu
Xinyu
X
Furdyna
Jacek K
JK