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VOLUME 52 (1990) | ISSUE 4 | PAGE 877
Dilute quasi-1D antiferromagnets
Even a small number of defects which break magnetic bonds along chains have a substantial effect on the properties of spin waves and the transverse susceptibility in quasi-ID antiferromagnets. The behavior of the susceptibility and of the spin-wave velocity on the defect concentration χ has been found in the region 1 > χ >(Л/J\\)1/2, where a perturbation theory in χ is not applicable.