Magnetic susceptibility of EuTe/PbTe Heisenberg superlattices: experimental and theoretical studies

Details Magnetic susceptibility of EuTe/PbTe Heisenberg superlattices: experimental and theoretical studies Magnetic susceptibility of EuTe/PbTe Heisenberg superlattices: experimental and theoretical studies

1997-01-23

arxiv.org/abs/cond-mat/9701175v1

Physics

Condensed Matter

30 pages, 8 ps figures, RevTex

Scientific paper

10.1103/PhysRevB.56.3281

We report results on the temperature dependence of the susceptibilities of a set of MBE-grown short-period EuTe/PbTe antiferromagnetic superlattices having different EuTe layer thicknesses. In-plane and orthogonal susceptibilities have been measured and display a strong anisotropy at low temperature, confirming the occurrence of a magnetic phase transition in the thicker samples, as seen also in neutron diffraction studies. We suggest that dipolar interactions stabilize antiferromagnetic long-range order in an otherwise isotropic system and we present numerical and analytical results for the low-temperature orthogonal susceptibility.

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