Magnetic properties and magnetic reversal processes of the Sm-Gd-Zr-Co-Cu-Fe alloys
P.A. Rakunov, M.B. Lyakhova, E.M. Semenova, A.Yu. Karpenkov
Tver State University
DOI: 10.26456/pcascnn/2024.16.258
Original article
Abstract: The results of experimental studies of magnetic properties and magnetization reversal processes of a series of alloys Sm-Gd-Zr-Co-Cu-Fe are presented. The studied samples were subjected to prolonged isothermal annealing for 24 hours, which made it possible to achieve the formation of a certain nanostructure that affects the hysteresis properties of the material and allows to achieve a high coercivity state. According to the magnetic measurements data obtained by the method of a vibrating magnetometer, the hysteresis loops are constructed, the dependence of the saturation magnetization, and the coercive force on chemical composition, and the values of the temperature coefficient of magnetization change depending on the relative content of Sm and Gd are determined. It is shown that the substitution of a part of samarium atoms for gadolinium atoms increases the effect of the mechanism of irreversible rotation of the spontaneous magnetization vector on the remagnetization of samples. Application of the studied samples in various devices puts serious demands on the stability of their magnetic properties at high temperatures. Our researches allow us to conclude that compounds with gadolinium concentration x=0,5 have the greatest coercive force, and compounds with gadolinium concentration in the range x=0,5-0,6 have the highest temperature stability.
Keywords: rare earth intermetallic compounds, hard magnetic materials, hysteresis, coercive force, magnetization, magnetization reversal processes
- Pavel A. Rakunov – 3rd year postgraduate student, Assistant, Condensed Matter Physic Department, Tver State University
- Marina B. Lyakhova – Ph. D., Docent, Senior Researcher, Condensed Matter Physics Department, Tver State University
- Elena M. Semenova – Ph. D., Docent, Condensed Matter Physics Department, Tver State University
- Alexey Yu. Karpenkov – Ph. D., Docent, Head of Condensed Matter Physics Department, Tver State University
Reference:
Rakunov, P.A. Magnetic properties and magnetic reversal processes of the Sm-Gd-Zr-Co-Cu-Fe alloys / P.A. Rakunov, M.B. Lyakhova, E.M. Semenova, A.Yu. Karpenkov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2024. — I. 16. — P. 258-266. DOI: 10.26456/pcascnn/2024.16.258. (In Russian).
Full article (in Russian): download PDF file
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