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, Yu.V. Kuznetsova1, D.Yu. Karpenkov2, A.I. Ivanova1, A.Yu. Karpenkov1, A.I. Sinkevich1, A.S. Antonov1,3, N.Yu. Sdobnyakov1

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

DOI: 10.26456/pcascnn/2020.12.149

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.

Bibliography link:

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, Yu.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. – 2020. – I. 12. – P. 149-161. DOI: 10.26456/pcascnn/2020.12.149. (In Russian).

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