Abrupt processes of remagnetization reversal processes in single crystals of GdCo4Cu alloy

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Abstract

The results of the study of the features of the magnetization and remagnetization processes in single-crystal samples of the GdCo4Cu alloy are presented. Depending on the magnetic background, the coexistence of two hysteresis mechanisms is observed. Along with a significant magnetic viscosity, abrupt remagnetization is observed. The relationship of hysteresis processes with the structural state of samples is discussed.

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About the authors

Yu. V. Kuznetsova

Tver State University

Author for correspondence.
Email: kuznetsova.yv@tversu.ru
Russian Federation, Tver

O. B. Degteva

Tver State University

Email: kuznetsova.yv@tversu.ru
Russian Federation, Tver

A. Y. Karpenkov

Tver State University

Email: kuznetsova.yv@tversu.ru
Russian Federation, Tver

Е. М. Semenova

Tver State University

Email: kuznetsova.yv@tversu.ru
Russian Federation, Tver

M. A. Belyavsky

Tver State University

Email: kuznetsova.yv@tversu.ru
Russian Federation, Tver

E. B. Mitina

Tver State University

Email: kuznetsova.yv@tversu.ru
Russian Federation, Tver

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2. Fig. 1. Images of the microstructure on the base surface of a section of a single crystal of the GdCo4Cu alloy after annealing at 1100 °C for 5 hours, revealed by the SEM method, as well as the energy-dispersive analysis spectra corresponding to the highlighted areas.

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3. Fig. 2. Images of hysteresis loops for a single crystal of the GdCo4Cu alloy in the states after melting (a) and annealing (b), obtained using the vibration magnetometer method in the temperature range of 300–600 K.

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4. Fig. 3. Temperature dependences of the coercive force of GdCo4Cu alloy samples in the as-smelted and annealed state.

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5. Fig. 4. Time dependences of jumps in specific magnetization for GdCo4Cu single crystals in the as-melted (a) and annealed (b) state, obtained using a vibration magnetometer at room temperature.

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