title: Finite temperature orbital and spin magnetism of small Fe linear chains.
abstract: The finite temperature spin and orbital magnetism of N≤ 10 Fe(N) linear chains is theoretically studied in the framework of a spin fluctuation theory based on a realistic d-band model Hamiltonian, which includes the spin-orbit coupling interaction in a non-perturbative way. Spin and orbital magnetic moments are calculated as a function of the temperature by using an exchange Monte Carlo method that takes into account in a full way the short-range magnetic order. The finite temperature anisotropy effects on the spin and orbital cluster moment values are analysed by considering magnetization directions perpendicular to and along the chain axis. The temperature dependence of the orbital cluster moment follows a general trend similar to that of the spin one and shows clear anisotropy effects at low and intermediate temperatures, before total thermal disorder appears. Interesting anisotropy effects driven by thermal spin fluctuations are also observed for the spin results in most of the systems.
authors.affiliation: Departamento de Ingenierías, CU-Tonalá, Universidad de Guadalajara, Morelos 180, CP 45400, Tonalá, Mexico.
authors.forename: R
authors.initials: R
authors.lastname: Garibay-Alonso
authors.forename: I
authors.initials: I
authors.lastname: Guillén-Escamilla
authors.forename: M
authors.initials: M
authors.lastname: Reyes-Reyes
authors.forename: R
authors.initials: R
authors.lastname: López-Sandoval