We analyzed the magnetic behavior of a S-spin system within framework of the Tsallis nonextensive statistics, employing the normalized approach. Unusual properties on magnetization, entropy and susceptibility emerge, as a consequence of nonextensivity. We further show that the nonextensive approach can be relevant to the field of manganites, materials which exhibit long-range interactions and fractality, two basic ingredients for nonextensivity. Our results are in qualitative agreement to experimental data in La$_{ 0.67}$Ca$_{ 0.33}$MnO$_3$ and Pr$_{ 0.5}$Ca$_{ 0.5}$Mn$_{ 0.95}$Ga$_{ 0.05}$O$_3$ manganites.
Categories: cond-mat.stat-mech cond-mat.str-el