B. Boechat et al., RENORMALIZATION-GROUP CALCULATION OF THERMODYNAMIC FUNCTIONS IN DISORDERED ISING SYSTEMS, Journal of magnetism and magnetic materials, 124(1-2), 1993, pp. 135-142
We investigate the behaviour of the specific heat and the spontaneous
magnetisation in bond disordered Ising ferromagnetic systems. We use a
real space renormalisation group approach which allows the probabilit
y distributions to evolve along the renormalisation process. Such stat
istical treatment provides a natural description of various kinds of m
agnetic disorder and gives a good approximation for d-dimensional syst
ems. Our method is conceived to deal with different exchange coupling
magnitudes, and therefore is suitable to deal with amorphous and dilut
e disordered magnets.