Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Effects of low-temperature treatment on magnetic properties of Sm(Co, Cu, Fe)5 compounds

E.M. Semenova1, M.B. Lyakhova1, D.V. Ivanov1, Y.V. Kuznetsova1, D.Yu. Karpenkov2, A.I. Ivanova1, A.Yu. Karpenkov1, A.I. Sinkevich1, A.S. Antonov1,3, N.Yu. Sdobnyakov1

1 Tver State University
2 National University of Science and Technology «MISiS»
3 Tver State Agricultural Academy

DOI: 10.26456/pcascnn/2020.12.149

Original article

Abstract: The results on the micro- and nanostructures and on the magnetic domain structure of Sm(Co0,45, Cu0,40, Fe0,15)5 compound are presented. It was shown that the sequential high- and low-temperature heat treatments lead to formation of a homogeneous microstructure with some nanoscale compositional heterogeneities. Such a structure provides the coercive field HcI of up to 32 kOe. The coercivity and remanent magnetization of the samples in the temperature range from 300 to 700 K linearly decrease. It is shown that the nanostructure of the alloy with the highest HcI corresponds to the fractal dimension Df-n ~ 2,3.

Keywords: Sm(Co, Cu, Fe)5 , coercivity, nanostructure, domain structure, fractal dimension

  • Elena M. Semenova – Ph. D., Docent of the Condensed Matter Physic Department Tver State University
  • Marina B. Lyakhova – Ph. D., Docent of the Condensed Matter Physic Department Tver State University
  • Dmitry V. Ivanov – postgraduate student of the General Physics Department Tver State University
  • Yulia V. Kuznetsova – Ph. D., Docent of the Condensed Matter Physic Department Tver State University
  • Dmitriy Yu. Karpenkov – Ph. D., Senior Researcher National University of Science and Technology «MISiS»
  • Alexandra I. Ivanova – Ph. D., Docent of the Applied Physic Department Tver State University
  • Alexey Yu. Karpenkov – – Ph. D., Docent of the Condensed Matter Physic Department Tver State University
  • Artem I. Sinkevich – 2nd year graduate student Tver State University
  • Alexander S. Antonov – Ph. D., Researcher Tver State University, Senior Lecturer Tver State Agricultural Academy
  • Nickolay Yu. Sdobnyakov – Ph. D., Docent of the General Physics Department Tver State University

Reference:

Semenova, E.M. Effects of low-temperature treatment on magnetic properties of Sm(Co, Cu, Fe)5 compounds / E.M. Semenova, M.B. Lyakhova, D.V. Ivanov, Y.V. Kuznetsova, D.Yu. Karpenkov, A.I. Ivanova, A.Yu. Karpenkov, A.I. Sinkevich, A.S. Antonov, N.Yu. Sdobnyakov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. – Tver: TSU, 2020. — I. 12. — P. 149-161. DOI: 10.26456/pcascnn/2020.12.149. (In Russian).

Full article (in Russian): download PDF file