A. STASZCZAK, J. DOBACZEWSKI, W. NAZAREWICZ Department of Theoretical Physics, Institute of Physics, Maria Curie-Sk lodowska University, pl. M. Curie-Sk lodowskiej 1, 20-031 Lublin, Poland Department of Physics, University of Tennessee, Knoxville, TN 37996, Knoxville, USA Physics Division, Oak Ridge National Laboratory, P.O.Box 2008, Oak Ridge, TN 37831, USA Institute of Theoretical Physics, Wa...

The magnetic properties of uncoated, epitaxial Tb(0001) films on W(110) substrates are studied using electron capture spectroscopy. The topmost layer orders ferromagnetically below a surface Curie temperature Tc. = 249.96 f 0.02 K, which lies above the bulk Curie and NCI temperatures Tcb=220 K and TNb = 228 K. Near Tcs, novel critical behavior is observed, suggesting the existence of strong sur...

High-accuracy Swendsen and Wang Monte Carlo simulations were performed to study the Curie temperature of ferromagnetic, binary Ising systems on the square lattice. Our results are compared with mean-field like approaches. Based on these former theories, we give a new formula to estimate the Curie temperature of the system. PACS number(s): 75.10H; 75.20E; 75.40M

a Université Pierre et Marie Curie-Paris 6; CNRS; Laboratoire de Physique Moléculaire pour l’Atmosphère et l’Astrophysique (LPMAA), UMR 7092, Case courrier 76, 4, place Jussieu, 75252 Paris Cedex 05, France b Université Pierre et Marie Curie-Paris 6; CNRS; Laboratoire de Dynamique, Interactions et Réactivité (LADIR), UMR 7075, Case courrier 49, Bât F 74, 4, place Jussieu, 75252 Paris Cedex 05, ...

Amélie N. Dreiss, Carlos Navarro, Florentino de Lope, and Anders P. Møller Laboratoire Fonctionnement et Evolution des Systèmes Ecologiques, Université Pierre et Marie Curie-Paris 6, Paris, France, Departamento Ecologı́a Funcional y Evolutiva, Consejo Superior de Investigaciones Cientı́ficas, Almerı́a, Spain, Departamento de Biologı́a Animal, Universidad de Extremadura, Badajoz, Spain, and Laborato...

Bernard Gaveau, Michel Moreau, and Janos Toth Laboratoire Equations aux Dérivées Partielles, Université Pierre et Marie Curie, Case courrier 172, 75252 Paris Cedex 05, France Laboratoire Physique Théorique des Liquides, Université Pierre et Marie Curie, 75252 Paris Cedex 05, France Department of Computer Science, Agricultural University, Gödöllö, Pater K. u.1 H-2103, Hungary ~Received 20 Januar...