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Behavior of the critical temperature of Ising thin films with variable surface magnetic moments
1Department of Physics, Penn State University-Beaver Campus, 100 University Drive, Monaca, Pennsylvania 15061, USA.
Abstract:
Properties of magnetic thin films are of considerable interest both for applied as well as theoretical reasons. I study the behavior of Ising thin films through the use of layered Bethe lattices and Husimi trees. In particular the behavior of the critical temperature both as a function of the number of layers and as a function of variable magnetic moments of surface spins is presented. The later is motivated by that fact that such variation has been found to occur in physical systems such as Ni and Fe free surfaces and Ni/Co interfaces. The approach used is more accurate than many previously used and most importantly shows a different qualitative behavior of the critical temperature from previous studies.
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