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Spatially resolved inhomogeneous ferromagnetism in (Ga,Mn)As diluted magnetic semiconductors: A microscopic study by muon spin relaxation


Storchak, V G; Eshchenko, D G; Morenzoni, E; Prokscha, T; Suter, A; Liu, X; Furdina, J K (2008). Spatially resolved inhomogeneous ferromagnetism in (Ga,Mn)As diluted magnetic semiconductors: A microscopic study by muon spin relaxation. Physical Review Letters, 101(2):027202.

Abstract

Thin epitaxial films of the diluted magnetic semiconductor (DMS) GaMnAs have been studied by low energy muon spin rotation and relaxation (LE-µSR) as well as by transport and magnetization measurement techniques. LE-µSR 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.

Abstract

Thin epitaxial films of the diluted magnetic semiconductor (DMS) GaMnAs have been studied by low energy muon spin rotation and relaxation (LE-µSR) as well as by transport and magnetization measurement techniques. LE-µSR 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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2008
Deposited On:10 Feb 2009 10:26
Last Modified:18 Feb 2018 10:31
Publisher:American Physical Society
ISSN:0031-9007
OA Status:Closed
Publisher DOI:https://doi.org/10.1103/PhysRevLett.101.027202
PubMed ID:18764221

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