Magnetic Properties of Semiconductor-Antiferromagnet Superlattices
Z. Wilamowski, R. Buczko
Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

W. Jantsch, M. Ludwig and G. Springholz
Johannes Kepler Universität, 4040 Linz, Austria
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Magnetic resonance investigations of ultra-thin antiferromagnetic EuTe layers show a specific behaviour in the quasi-2D antiferromagnetic ordering: (i) an anisotropy of the critical broadening, (ii) a substantial increase in the Néel temperature and (iii) an anisotropic shift of the resonance frequency which diverges at the Néel point. The results show that exchange coupling is stronger in quasi-2D than in 3D antiferromagnetic samples and that correlation of spin chains aligned in the perpendicular direction occurs already well above the Néel point.
DOI: 10.12693/APhysPolA.90.973
PACS numbers: 75.50.Ee, 75.50.Pp, 76.50.+g