A Monte Carlo study of the Blume–Capel thin film in the presence of a random crystal field

• A Blume–Capel thin film is investigated using the MCS.
• The effect of the random crystal field on the phase diagrams has been examined.
• The double reentrant phenomena and the tricritical point are observed.
• The randomness parameter destroys the tricritical behavior.

A Monte Carlo simulation with heat bath algorithm is used to study the effect of random crystal field and surface exchange interactions on the critical behavior and the magnetic properties of a spin-1 Ising ferromagnetic thin film having the simple cubic symmetry. The phase diagram exhibits a rich variety of behaviors such as the double reentrant phenomena and the existence of tricritical points. Thermal magnetization behavior and phase diagrams have been discussed in detail.