Random-exchange Heisenberg antiferromagnetic chains in Langmuir-Blodgett films ofN-docosylpyridinium-bistetracyanoquinodimethane

Abstract
An ESR investigation is performed on Langmuir-Blodgett (LB) films consisting of a surface-active 1:2 complex of N-docosylpyridinium and tetracyanoquinodimethane (TCNQ). A characteristic temperature dependence in the spin susceptibility and the linewidth is observed, which shows reasonable agreement with the random-exchange Heisenberg antiferromagnetic chain (REHAC) model of Soos and Bondeson.