Aiming to test whether the polynomial fit methodology would work for a hard magnet, the descending and ascending branches of the hysteresis curves measured for an Alnico II sample were fitted with polynomials of varying degrees. The fits were of very good quality, and the resulting polynomial coefficients revealed symmetrical minor loops. The polynomials showed a great feasibility for mathematical manipulation to obtain magnetic parameters, such as residual induction, coercive field, permeabilities, and area of a minor loop. This area was traced as a function of the maximum magnetic field applied to the minor loop, and the resulting curve was fitted by using the complementary function of the Hill equation. The fitted Hill parameters were revealed to be correlated with the magnetic hardness of this Alnico II sample. The effectiveness of the analysis performed for the minor loops of the Alnico II sample suggests the universality of this mathematical approach.

为了测试多项式拟合方法是否适用于硬磁体，对Alnico II样品测得的磁滞曲线的上升和下降分支均拟合了不同程度的多项式。拟合质量非常好，所得的多项式系数显示出对称的次要循环。多项式显示出进行数学运算以获得磁参数的极大可行性，例如剩余感应，矫顽场，磁导率和小环的面积。将该面积作为施加到次回路的最大磁场的函数进行跟踪，并通过使用希尔方程的互补函数来拟合所得曲线。拟合的Hill参数显示与该Alnico II样品的磁硬度相关。