Reentrant Phenomenon and Tunable Magnetic Transitions in Monolayer Graphyne-like Nanostructures: A Monte Carlo Study

The magnetic properties of the monolayer graphyne-like nanostructures (MGLN) with mixed spins (S=1 and σ=7/2) are investigated by Monte Carlo simulation within the Blume-Capel model. The performed Monte Carlo simulations have produced some interesting features displaying the reentrant phenomenon. A detailed analysis of the system reveals the complex nature of its phase transitions with significant tunability in magnetism. Notably, a first-order to second-order magnetic transition crossover governed by T or H has been found in the system. These findings will be useful for understanding controllable magnetic responses in MGLN and for further spintronic and technological applications.