The critical behaviors of resistivity in nickel films

The critical phenomena in nickel films have been studied by observing the resistivity behavior with temperatures near the Curie point. We observed the thickness dependence of the Curie point in nickel films, that is, the thinner the film is, the lower the Curie point is. This is as expected. Using the heat capacity data, we also found the amplitude ratios of bulk and film systems to be 1.222 and 1.197(average0, respectively. These values are cose to the theoretical prediction of 1.46 given by the Heisenberg, S=$\infty$ Model.