abstract

• The finite temperature spin and orbital magnetism of N ≤10 FeN linear chains is theoretically studied in the framework of a spin fluctuation theory based on a realistic d-band model Hamiltonian, which includes the spinorbit 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. © 2015 IOP Publishing Ltd Printed in the UK.

authors

• Garibay-Alonso R.
• Guillén-Escamilla I.
• López-Sandoval R.
• Reyes Reyes Marisol

publication date

• 2015-01-01

published in

• Journal of Physics Condensed Matter  Journal

keywords

• iron clusters; Monte Carlo simulation; spinorbit coupling effects; temperature dependence Anisotropy; Chains; Hamiltonians; Holmium compounds; Intelligent systems; Magnetic moments; Magnetism; Monte Carlo methods; Temperature distribution; Intermediate temperatures; Iron cluster; Magnetization direction; Short-range magnetic orders; Spin and orbital magnetic moments; Spin-orbit coupling effects; Spin-orbit coupling interactions; Temperature dependence; Spin fluctuations

Digital Object Identifier (DOI)

• 10.1088/0953-8984/27/28/286001

start page

end page

volume

• 27

issue

• 28