Critical Behavior of Magnetic Losses in Nickel near the Curie Temperature: Separation of Magnetic Losses by Analyzing Linear and Nonlinear Susceptibilities

A new method is proposed to separate magnetic losses near the Curie temperature TC by analyzing both the ac linear (X0) and nonlinear (X2) susceptibilities on the basis of the Rayleigh law. This method is applied to X0 and X2 of nickel to obtain the temperature dependence of the Rayleigh constant and the linear and the nonlinear terms of the residual loss near TC. The Rayleigh constant diverges approaching TC from below. The residual-loss terms show sharp peaks at TC. Analysis of the critical behavior yields the values of the critical exponents for the Rayleigh constant and the residual-loss terms. KCI Citation Count: 8