HYSTERESIS STRUCTURE AND MAGNETIC PROPERTIES OF (R, Zr)(Co, Cu, Fe)Z (R = Sm, Gd) ALLOYS

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Abstract

The results of an experimental study of magnetization reversal processes of (R,Zr)(Co,Cu,Fe)Z (R = Sm, Gd) alloys taking into account micro- and nanostructure are presented. To create a highly coercive state in the samples, they were isothermally annealed at 800°C for 8-24 hours. The duration of annealing affects the formation of the nanostructure of alloys of this type. Based on magnetic measurements performed using a vibration magnetometer, magnetic hysteresis loops and graphs of the dependence of the coercive force on the chemical composition and duration of heat treatments were obtained, and the range of changes in the temperature coefficient of magnetic induction was determined depending on the relative content of Sm and Gd in the samples. Data on micro- and nanostructure were obtained using optical and scanning probe microscopy. The correlation relationships between the micro- and nanostructure parameters and the magnetic properties of the studied alloys are described. It was found that the highest values of the coercive force are achieved in an alloy in which the value is x = 0,5.

About the authors

Marina B. Lyakhova

Tver State University

Tver, Russia

Elena M. Semenova

Tver State University

Email: semenova_e_m@mail.RUS
Tver, Russia

Pavel A. Rakunov

Tver State University

Tver, Russia

Alexey Yu. Karpenkov

Tver State University

Tver, Russia

Artem I. Sinkevich

Tver State University

Tver, Russia

Maxim V. Fedorov

Tver State University

Tver, Russia

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