High-field magnetization study of the S=1/2 antiferromagnetic Heisenberg chain Cu(C6H5COO)2·3H2O

Abstract: We present a temperature-dependent high-field magnetization study of the antiferromagnetic Heisenberg chain (AFHC) along the magnetically characteristic axis . The data are analyzed on basis of the Bethe ansatz equations and via exact diagonalization of a linear spin chain with 20 sites. Overall, we find a very good agreement between experimental data and theoretical calculations, and extract a magnetic coupling strength along the chain of 18.8(1)K. We discuss our results in context with the possibility for a magnetocaloric effect during the magnetization process of AFHC systems. [Copyright &y& Elsevier]