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

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

2002-07-09

arxiv.org/abs/cond-mat/0207245v1

Physics

Condensed Matter

Statistical Mechanics

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

Scientific paper

10.1103/PhysRevB.66.134417

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.

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