Magnetic behavior of a non-extensive S-spin system: possible connections to manganites

Abstract

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.

5 pages and 6 figures. Submitted to Phys. Rev. B