The Magnetic Susceptibility of Alloys Below the Percolation Threshold
V. I. Belokona, O. I. Dyachenkob, *, and R. V. Lapenkova
a Institute of Science-Intensive Technologies and Advanced Materials, Department of Theoretical Physics
and Intelligent Technologies, Far Eastern Federal University, Vladivostok, 690922 Russia
b Institute of Science-Intensive Technologies and Advanced Materials, Department of General and Experimental Physics,
Far Eastern Federal University, Vladivostok, 690922 Russia
Correspondence to: *e-mail: dyachenko.oi@dvfu.ru
Received 19 August, 2022
Abstract—Within the theory of random interaction fields, the possibility of determining the Curie point and the paramagnetic Curie point corresponding to the appearance of short-range order is shown. In ferromagnetic alloys, there is a concentration range in which the long-range order is destroyed, but the short-range order persists. This leads to the appearance of a cluster glass phase, which is characterized by a time dependence of the magnetic susceptibility and the appearance of viscous magnetization. For an AuFe alloy as an example, the behavior of the initial magnetic susceptibility as a function of temperature and concentration is studied and compared with experimental data.
Keywords: magnetic susceptibility, cluster glass phase, theory of random interaction fields, Curie temperature, magnetic viscosity, alloys
DOI: 10.1134/S0031918X22601755