The universality of the magnetization irreversibility line of metglasses and superconductors

Abstract

An analysis of the experimental data of the temperature dependence of metallic glass and superconductor magnetization. A common feature is the irreversibility of magnetization: below a certain temperature T*, under fixed field strength, magnetization varies during cooling within (MFC), and outside (MZFC) of a magnetic field. It is demonstrated that for all samples, the line T*(H) is universal, and corresponds to the theoretical dependence of de Almeida-Thouless (T* ∼ H2/3) in all studied ranges of magnetic fields.