Dilute quasi-1D antiferromagnets
Korenblit I. Ya. , Shender E. F.
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.