화학공학소재연구정보센터
Applied Surface Science, Vol.255, No.16, 7462-7467, 2009
Critical behaviour of magnetic thin film with Heisenberg spin-S model
The magnetic properties of a ferromagnetic thin film of face centered cubic (FCC) lattice with Heisenberg spin-S are examined using the high-temperature series expansions technique extrapolated with Pade approximations method. The critical reduced temperature of the system tau(c) is studied as function of thickness of the film and the exchange interactions in the bulk, and within the surfaces J(b), J(s) and J(perpendicular to) respectively. A critical value of surface exchange interaction above which surface magnetism appears is obtained. The dependence of the reduced critical temperature on the film thickness L has been investigated. (C) 2009 Elsevier B.V. All rights reserved.