Abstract:This work presents a Monte Carlo study of the phase transition in the perovskites La0.7Sr0.3Mn 3+ 0.7 Mn 4+ 0.3−x TixO3 (x= 0.1, 0.2, and 0.25). We take into account nearest-neighbor (NN) interactions between magnetic ions Mn 3+ (S = 2) and Mn 4+ (S = 3/2) using a spin model describing a strong anisotropy on the z axis. We have calculated the uniform and staggered magnetizations as well as the Edwards-Anderson order parameter as functions of temperature, with and without an applied magnetic field. Fitting the … Show more
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