title: Effective-field-theory analysis of the three-dimensional random-field Ising model on isometric lattices.
abstract: An Ising model with quenched random magnetic fields is examined for single-Gaussian, bimodal, and double-Gaussian random-field distributions by introducing an effective-field approximation that takes into account the correlations between different spins that emerge when expanding the identities. Random-field distribution shape dependencies of the phase diagrams and magnetization curves are investigated for simple cubic, body-centered-cubic, and face-centered-cubic lattices. The conditions for the occurrence of reentrant behavior and tricritical points on the system are also discussed in detail.
authors.affiliation: Department of Physics, Dokuz Eylül University, Izmir, Turkey.
authors.forename: Umit
authors.initials: U
authors.lastname: Akıncı
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Yüksel
authors.forename: Hamza
authors.initials: H
authors.lastname: Polat