Monte Carlo studies of critical and dynamic phenomena in diluted Ising metamagnet in a field

Monte Carlo simulations have been used to study critical, tricritical as well as some history-dependent properties of a diluted Ising metamagnet in an external field. Phase boundaries, including location of tricritical points, have been established in a broad concentration range. A first-order transition is estimated to survive down to at least p=0.5, i.e., even in an extreme dilution region. In the region of strong dilution additional shorter simulations on lattices of large linear size have been run in order to study irreversibilities associated with the domain state formation