Physics of the Solid State
Volumes and Issues
Yttrium influence on magnetic properties and hyperfine interactions in multicomponent substitution alloys (Dy1-xYx)0.8Sm0.2Fe2
Umkhaeva Z. S. 1, Rusakov V. S. 2, Gubaydulina T. V. 2, Karpenkov A.Yu. 3, Tereshina I. S. 2, Pankratov N. Yu. 2, Aliev I. M. 1
1Kh. Ibragimov Complex Institute of the Russian Academy of Sciences, Groznyi, Russia
2Lomonosov Moscow State University, Moscow, Russia
3Tver State University, Tver, Russia
Email: zargan.umhaeva@yandex.ru, rusakov@phys.msu.ru, tgubaidulina@yandex.ru, Karpenkov_alex@mail.ru, irina_tereshina@mail.ru, pankratov@phys.msu.ru, ialiew@mail.ru

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The paper presents the results of investigation of structure, magnetic properties and superfine interactions in multicomponent alloys based on rare-earth elements (R), Sm and their analogue Y of RFe2 stoichiometry. To obtain new multicomponent alloys, a complex type of substitution in the rare-earth sublattice was used, namely, weakly magnetic samarium atoms at a fixed concentration of 20 at.% were first introduced into the dysprosium sublattice, followed by non-magnetic yttrium atoms at the values of the substitution parameter x=0, 0.2, 0.4, 0.6, 0.8, 1.0. This type of substitution, first of all, leads to the competition of exchange interactions between magnetically active ions in a wide temperature region of their magnetic ordering. The competition also leads to a number of unique magnetic phase transformations in the resulting alloys, including the phenomenon of magnetic compensation of the rare-earth and 3d sublattice, as well as spin reorientation. The values of the main parameters of Mossbauer spectra on 57Fe nuclei in (Dy1-xYx)0.8Sm0.2Fe2 alloys and their dependence on yttrium concentration at T=300 K have been determined. The field dependences of magnetostriction in fields up to 12 kOe have been investigated. Keywords: Laves phases, magnetization, Curie temperature, magnetic moment, Mossbauer effect, hyperfine interactions.
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