title: Spatially resolved inhomogeneous ferromagnetism in (Ga,Mn)as diluted magnetic semiconductors: a microscopic study by muon spin relaxation.
abstract: 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.
authors.affiliation: Russian Research Centre Kurchatov Institute, Kurchatov Square 1, Moscow 123182, Russia. storchak@stor.polyn.kiae.su
authors.forename: Vyacheslav G
authors.initials: VG
authors.lastname: Storchak
authors.forename: Dmitry G
authors.initials: DG
authors.lastname: Eshchenko
authors.forename: Elvezio
authors.initials: E
authors.lastname: Morenzoni
authors.forename: Thomas
authors.initials: T
authors.lastname: Prokscha
authors.forename: Andreas
authors.initials: A
authors.lastname: Suter
authors.forename: Xinyu
authors.initials: X
authors.lastname: Liu
authors.forename: Jacek K
authors.initials: JK
authors.lastname: Furdyna