Publikation:

Tailoring the magnetoresistance of MnAs/GaAs:Mn granular hybrid nanostructures

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2008

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Michel, Christoph
Elm, Matthias T.
Baranovskii, Sergei
Thomas, Peter
Heimbrodt, Wolfram
Klar, Peter J.

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Applied Physics Letters. 2008, 92(22), 223119. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.2937128

Zusammenfassung

The magnetoresistanceproperties of GaAs:Mn/MnAs granular hybrid structures consisting of ferromagnetic MnAs clusters within a paramagnetic GaAs:Mn host differ considerably from those of paramagnetic and ferromagnetic (Ga,Mn)As alloys. We analyze the magnetoresistance effects on the basis of a resistor network model. Typical experimental findings are reproduced and their dependence on cluster density and random spatial arrangement of the clusters are revealed. Controlled spatial positioning of the MnAs clusters within the GaAs:Mn host offers interesting opportunities for optimizing the magnetoresistanceproperties for applications and for overcoming problems of miniaturization arising from cluster statistics.

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004 Informatik

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Magnetoresistance, Materials properties, Hybrid materials, Granular systems, Magnetic fields

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ISO 690MICHEL, Christoph, Matthias T. ELM, Bastian GOLDLÜCKE, Sergei BARANOVSKII, Peter THOMAS, Wolfram HEIMBRODT, Peter J. KLAR, 2008. Tailoring the magnetoresistance of MnAs/GaAs:Mn granular hybrid nanostructures. In: Applied Physics Letters. 2008, 92(22), 223119. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.2937128
BibTex
@article{Michel2008Tailo-29121,
  year={2008},
  doi={10.1063/1.2937128},
  title={Tailoring the magnetoresistance of MnAs/GaAs:Mn granular hybrid nanostructures},
  number={22},
  volume={92},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Michel, Christoph and Elm, Matthias T. and Goldlücke, Bastian and Baranovskii, Sergei and Thomas, Peter and Heimbrodt, Wolfram and Klar, Peter J.},
  note={Article Number: 223119}
}
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