Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Hysteresis structure and magnetic properties of (R, Zr)(Co, Cu, Fe)Z (R = Sm, Gd) alloys

M.B. Lyakhova, E.M. Semenova, P.A. Rakunov, A.Yu. Karpenkov, A.I. Sinkevich, M.V. Fedorov

Tver State University

DOI: 10.26456/pcascnn/2023.15.169

Original article

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.

Keywords: rare earth intermetallic compounds, hysteresis, coercive force, magnetization, microstructure, nanostructure

  • Marina B. Lyakhova – Ph. D., Researcher, Condensed Matter Physics Department, Tver State University
  • Elena M. Semenova – Ph. D., Docent, Condensed Matter Physics Department, Tver State University
  • Pavel A. Rakunov – 2nd year postgraduate student, Assistant, Condensed Matter Physic Department, Tver State University
  • Alexey Yu. Karpenkov – Ph. D., Docent, Condensed Matter Physics Department, Tver State University
  • Artem I. Sinkevich – 3rd year postgraduate student, Assistant, Condensed Matter Physic Department, Tver State University
  • Maxim V. Fedorov – 2nd year master student, Faculty of Physics and Technology, Tver State University

Reference:

Lyakhova, M.B. Hysteresis structure and magnetic properties of (R, Zr)(Co, Cu, Fe)Z (R = Sm, Gd) alloys / M.B. Lyakhova, E.M. Semenova, P.A. Rakunov, A.Yu. Karpenkov, A.I. Sinkevich, M.V. Fedorov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2023. — I. 15. — P. 169-177. DOI: 10.26456/pcascnn/2023.15.169. (In Russian).

Full article (in Russian): download PDF file

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