Thickness dependent properties of magnetic ultrathinfilms
The dependence of magnetic properties on the thickness of few-layer thin films is investigated at finite temperature using the functional integral method for solving the Heisenberg spinmodel.The temperature dependence of the ultra-thin film's magnetization and Curie temperatureare calculated in termsofthemean field theory and of the Gaussian spin fluctuation approximations.It has been shown that both Curie temperature and temperature interval,where the magnetization is non-zero,are strongly reduced with the thickness reduction by using the spin fluctuation approximation sin comparison with the mean field results.Curie temperature dependence on the film thickness calculated numeri cally well agrees with the experimental data for Ni/Cu(100)and Ni/Cu(111)ultrathin films. Title: Thickness dependent properties of magnetic ultrathinfilms Authors: Bach, Thanh Cong Pham, Huong Thao Keywords: Thin film Magnetic properties Functional integral method Issue Da...