Alternating linear chains in a magnetic field

Publisher Website
Google Scholar
Abstract
The properties of alternating (dimerized) antiferromagnetic Heisenberg chains have become of interest recently, primarily in connection with experimental studies of spin-Peierls systems. In particular, the behavior in an applied magnetic field is largely unexplored. Consequently, a comprehensive theoretical study has been made of the field-dependence of the thermodynamic properties, susceptiblity, and specific heat as a function of temperature of such systems, on the basis of the Bulaevski Hartree-Fock approximation. This study was stimulated by precision susceptibility and specific heat experiments on the spin-Peierls system TTF–AuBDT at the Kamerlingh Onnes Laboratorium, Leiden.