Finite-size nanoscaling of the critical temperature of ferromagnets with variable range of spin interactions

摘要: We report an analysis of data on the thickness-dependent Curie temperatures TC itinerant ferromagnetic thin films with variable range spin interactions “tuned” by alloying transition metals. observe that decreases decreasing film thickness according to finite-size effect power law for two-dimensional Ising films, down a critical R0, beyond which point reduces linearly further thickness. The demarcation scales R0. parameter R0 evolution magnetic moment Slater-Pauling curve. This ultrathin provides measure effective in ferromagnets and demonstrates that, when dimension L below intrinsic interaction length no longer follows behavior.