Note 1 to entry: The AC magnetization, M(t), under the magnetic field strength of $h_0\cos \omega t$ is expanded as:

$M(t)=h_0{\displaystyle \sum _{n=0}^{\infty }\left[{\kappa }_n^{\prime }\cos (n\omega t)+{\kappa }_n^{″}\sin (n\omega t)\right]}$

where ${\kappa }_n^{\prime }$ and ${\kappa }_n^{″}$ are the real and imaginary parts of the AC magnetic susceptibility for the order n.

Note 2 to entry: The fundamental components ${\kappa }_1^{\prime }$ and ${\kappa }_1^{″}$ are mostly observed for measurements of superconducting transition.

Note 3 to entry: The AC loss energy density W is given as:

$W=\pi {\mu }_0{h}_0^2{\kappa }_1^{″}$