Study of the first-order phase transition in the classical and quantum random field Heisenberg model on a simple cubic lattice

Ricardo de Sousa, Douglas F. de Albuquerque, Alberto S. Arruda

The phase diagram of the Heisenberg ferromagnetic model in the presence of a magnetic random field (we have used bimodal distribution) of spin S=1/2 (quantum case) and $S=\infty$…