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research article
Magnetism in a Mn modulation-doped InAs/InGaAs heterostructure with a two-dimensional hole system
For an InAsquantum well which is modulation-doped with Mn we measure directly and simultaneously the magnetization and magnetic anisotropy of, both, the two dimensional hole system (2DHS) and Mn dopants. Using highly sensitive micromechanical torque magnetometry at 400 mK we observe the de Haas-van Alphen effect of the 2DHS in a magnetic field B up to 14 T. Around B = 0 we find a magnetic hysteresis which we attribute to the spontaneous ordering of magnetic moments in the interacting Mn-hole system. Tilted field experiments suggest a uniaxial magnetic anisotropy with the easy axis in (001) growth direction.
Type
research article
Authors
Rupprecht, B.
•
Krenner, W.
•
Wurstbauer, U.
•
Heyn, Ch.
•
Windisch, T.
•
Wilde, M. A.
•
Wegscheider, W.
•
Grundler, D.
Publication date
2010
Publisher
Published in
Volume
107
Issue
9
Article Number
093711
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
July 8, 2015
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