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.


Published in:
Journal of Applied Physics, 107, 9, 093711
Year:
2010
Publisher:
American Institute of Physics
ISSN:
0021-8979
Laboratories:




 Record created 2015-07-08, last modified 2018-03-17


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