Random arrangements of ferromagnetic MnAs nanoclusters were deposited on (111)B-GaInAs surfaces by standard metal-organic vapor-phase epitaxy (MOVPE). Ordered arrangements of MnAs nanoclusters and cluster chains were obtained by selective-area MOVPE on prepatterned (111)B-GaAs substrates. This new method enables one to control the arrangement of nanoclusters in the growth process offering interesting opportunities to tune the properties of individual MnAs clusters as well as the interaction between the carriers in the surrounding semiconductor matrix and the clusters. The magnetic anisotropy of the MnAs clusters was investigated by magnetic force microscopy and ferromagnetic resonance measurements. The in-plane magnetic anisotropy is mainly determined by the interplay of cluster shape and magnetocrystalline anisotropy while the hard magnetic axis of the clusters is perpendicular to the sample plane independent of cluster shape. The magnetotransport measurements demonstrate that the cluster arrangements strongly influence the transport properties.
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1 January 2010
Research Article|
January 04 2010
Comparison of the magnetic properties of GaInAs/MnAs and GaAs/MnAs hybrids with random and ordered arrangements of MnAs nanoclusters
M. T. Elm;
M. T. Elm
a)
1Institute of Experimental Physics I,
Justus-Liebig University
, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
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C. Michel;
C. Michel
1Institute of Experimental Physics I,
Justus-Liebig University
, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
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J. Stehr;
J. Stehr
1Institute of Experimental Physics I,
Justus-Liebig University
, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
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D. M. Hofmann;
D. M. Hofmann
1Institute of Experimental Physics I,
Justus-Liebig University
, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
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P. J. Klar;
P. J. Klar
1Institute of Experimental Physics I,
Justus-Liebig University
, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
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S. Ito;
S. Ito
2Research Center for Integrated Quantum Electronics,
Hokkaido University
, Sapporo 060-8628, Japan
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S. Hara;
S. Hara
2Research Center for Integrated Quantum Electronics,
Hokkaido University
, Sapporo 060-8628, Japan
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H.-A. Krug von Nidda
H.-A. Krug von Nidda
3Experimentalphysik V,
University of Augsburg
, 86159 Augsburg, Germany
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M. T. Elm
1,a)
C. Michel
1
J. Stehr
1
D. M. Hofmann
1
P. J. Klar
1
S. Ito
2
S. Hara
2
H.-A. Krug von Nidda
3
1Institute of Experimental Physics I,
Justus-Liebig University
, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
2Research Center for Integrated Quantum Electronics,
Hokkaido University
, Sapporo 060-8628, Japan
3Experimentalphysik V,
University of Augsburg
, 86159 Augsburg, Germany
a)
Electronic mail: [email protected].
J. Appl. Phys. 107, 013701 (2010)
Article history
Received:
October 06 2009
Accepted:
November 19 2009
Citation
M. T. Elm, C. Michel, J. Stehr, D. M. Hofmann, P. J. Klar, S. Ito, S. Hara, H.-A. Krug von Nidda; Comparison of the magnetic properties of GaInAs/MnAs and GaAs/MnAs hybrids with random and ordered arrangements of MnAs nanoclusters. J. Appl. Phys. 1 January 2010; 107 (1): 013701. https://doi.org/10.1063/1.3275427
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