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Thermodynamics of Heisenberg ferromagnets with arbitrary spin in a magnetic field
Physical Review B
The thermodynamic properties (magnetization, magnetic susceptibility, transverse and longitudinal correlation lengths, specific heat) of one- and two-dimensional ferromagnets with arbitrary spin S in a magnetic field are investigated by a second-order Green-function theory. In addition, quantum Monte Carlo simulations for S= 1/2 and S=1 are performed using the stochastic series expansion method. A good agreement between the results of both approaches is found. The field dependence of thedoi:10.1103/physrevb.77.174411 fatcat:asufl5txdjht5gmpnsjyhlw4ky