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Field Dependence of the Magnetization for the spin-ladder material Cu_2(C_5H_{12}N_2)_2Cl_4

Zheng Weihong·Rajiv R. P. Singh·J. Oitmaa
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Abstract

We have developed a series expansion method for calculating the uniform magnetization, M, as a function of the applied field h for Heisenberg systems at T=0. The method involves introducing Ising anisotropy along the z-axis together with an applied uniform field along the x-axis. On extrapolation to the isotropic limit, one recovers the magnetization for the Heisenberg system with an applied field along the x-axis. This method circumvents the difficulties in developing perturbation theory associated with the commuting nature of the uniform field. The results developed for two-chain ladders appropriate for the material Cu_2(C_5H_{12}N_2)_2Cl_4 are in good agreement with the experimental data. In addition, uniform susceptibility is calculated by high temperature expansions and also compared with the experimental data.

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Zheng Weihong, Rajiv R. P. Singh, J. Oitmaa. 1996-11-22. Field Dependence of the Magnetization for the spin-ladder material Cu_2(C_5H_{12}N_2)_2Cl_4. https://doi.org/10.1103/physrevb.55.8052

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