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Non-magnetic impurities in two- and three- dimensional Heisenberg antiferromagnets

Tai-Kai Ng
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Abstract

In this paper we study in a large-S expansion effects of substituting spins by non-magnetic impurities in two- and three- dimensional Heisenberg antiferromagnets in a weak magnetic field. In particular, we demonstrate a novel mechanism where magnetic moments are induced around non-magnetic impurities when magnetic field is present. As a result, Curie-type behaviour in magnetic susceptibility can be observed well below the Neel temperature, in agreement with what is being observed in $La_2Cu_{1-x}Zn_{x}O_4$ and $Sr(Cu_{1-x}Zn_x)_2O_3$ compounds.

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Tai-Kai Ng. 1996-07-30. Non-magnetic impurities in two- and three- dimensional Heisenberg antiferromagnets. https://doi.org/10.1103/physrevb.54.11921

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