Abstract
Multilayer Pd/Pd(1.2 at. % Fe)/Pd thin films were prepared by dc magnetron sputtering and characterized with dc SQUID magnetometry. Evidence for two-dimensional (2D) Heisenberg and 2D XY model behaviors was found in two different regions of temperature. In these temperature regimes, our data agree with the predicted form for magnetization M and susceptibility χ as functions of field and temperature. Both model’s susceptibilities were found to fit our data. M and χ exhibit discontinuities at magnetic layer thickness-dependent temperatures which separate the different model behaviors.
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