DOI: 10.18503/1995-2732-2026-24-3-100-107
Abstract
The aim of this study is to substantiate the hypothesis that the Seebeck coefficient can be used as an indicator of changes in the internal energy of a material. The study formulates and solves the problem of determining an analytical relationship between the Seebeck coefficient and the change in internal energy of an amorphous soft magnetic ribbon by jointly solving the equations of the first law of thermodynamics for an isochoric process, the equations relating the amount of heat to temperature during heating or cooling, and the equation formalizing the Seebeck effect. The calculations and graphical relationships have been based on experimental results obtained by measuring the thermal electromotive force (TEMF) and determining the Seebeck coefficients of an amorphous ribbon using the authors’ methodology. Heating and cooling experiments on the investigated amorphous ribbon specimens have been performed using the PocketJaw module of the Gleeble 3500 system with a specially designed assembly. It has been theoretically substantiated that the Seebeck coefficient is directly proportional to the TEMF and inversely proportional to unity minus the ratio of the changes in the internal energies of the cold and hot ends of the specimen, as well as to the temperature of the hot end of the specimen. It has been shown that the Seebeck coefficient characterizes the ratio of changes in the internal energies of the cold and hot ends of the specimen under thermal exposure and can be used as a structure-dependent parameter characterizing the initial internal energy state of an amorphous ribbon. It has been experimentally confirmed that there is no direct dependence between the Seebeck coefficient and the change in internal energy. The possibility of using the method for determining and analyzing Seebeck coefficients to characterize the initial internal energy state of the surfaces of an amorphous ribbon has been demonstrated.
Keywords
Finemet-class amorphous soft magnetic ribbon, thermal electromotive force, Seebeck coefficient, change in internal energy, thermal exposure.
For citation
Chukin M.V., Koptseva N.V., Efimova Yu.Y. Relationship Between the Seebeck Coefficient and the Internal Energy of the Finemet-Class Amorphous Soft Magnetic Ribbon. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2026, vol. 24, no. 3, pp. 100-107. https://doi.org/10.18503/1995-2732-2026-24-3-100-107
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