DOI: https://doi.org/10.30970/jps.02.201
ANTIFERROMAGNETISM IN REDUCED DIMENSIONAL SEMICONDUCTOR STRUCTURES
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Journal of Physical Studies 2(2), 201–204 (1998)
DOI: https://doi.org/10.30970/jps.02.201 ANTIFERROMAGNETISM IN REDUCED DIMENSIONAL SEMICONDUCTOR STRUCTURES |
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F. Schinagl, H. Krenn
Institut für Halbleiterphysik, Johannes Kepler Universität Linz
4040 Linz, Austria, e–mail: f.schinagl@hlphys.uni-linz.ac.at
We investigate layered nanostructures of the type II antiferromagnetic semiconductors separated by diamagnetic spacers. The magnetic ordering is described by isotropic Heisenberg exchange and dipolar interaction including an external magnetic field. According to the Hohenberg–Mermin–Wagner theorem, two–dimensional short ranged Heisenberg systems do not order at all. This does hold no longer as soon as dipolar interactions or other anisotropies are considered. Mean field predictions for the Néel Temperature \( T_{N} \) of EuTe/\-PbTe heterostructures are in good agreement with the measured values.