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Abstract <p>The paper presents the results of studying the thermal expansion of alloys of the multicomponent system (Tb<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(_{{1-x}}\)</EquationSource> <!--Cryst2560158Politova-m1--> </InlineEquation>Y<sub><i>х</i></sub>)<sub>0.8</sub>Sm<sub>0.2</sub>Fe<sub>2</sub> (where <i>х</i> is the substitution parameter) using tensometric and X-ray diffraction methods in a wide temperature range. A detailed study of the diffraction pattern was carried out at room temperature; splitting of the peaks was found for compositions with <i>х</i> = 0–0.4, indicating distortion of the initial cubic crystal lattice. Temperature dependences of the thermal expansion coefficient α(<i>T</i>) were plotted and analyzed. Features of thermal expansion in the region of magneto-phase transitions were discussed. A magnetostructural phase diagram of the alloy system (Tb<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(_{{1-x}}\)</EquationSource> <!--Cryst2560158Politova-m2--> </InlineEquation>Y<sub><i>х</i></sub>)<sub>0.8</sub>Sm<sub>0.2</sub>Fe<sub>2</sub> was constructed.</p>

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Features of Thermal Expansion and Magnetostructural Phase Diagram of the Multicomponent System (Tb,Y,Sm)Fe2

  • 期刊论文

  • 发表日期：

    2025年12月25日

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  • G. A. Politova,
  • N. Yu. Pankratov,
  • I. S. Tereshina,
  • T. A. Aleroeva,
  • Z. S. Umkhaeva,
  • O. A. Alekseeva,
  • A. V. Filimonov,
  • A. I. Rudskoy

摘要

Abstract

The paper presents the results of studying the thermal expansion of alloys of the multicomponent system (Tb \(_{{1-x}}\) Yх)0.8Sm0.2Fe2 (where х is the substitution parameter) using tensometric and X-ray diffraction methods in a wide temperature range. A detailed study of the diffraction pattern was carried out at room temperature; splitting of the peaks was found for compositions with х = 0–0.4, indicating distortion of the initial cubic crystal lattice. Temperature dependences of the thermal expansion coefficient α(T) were plotted and analyzed. Features of thermal expansion in the region of magneto-phase transitions were discussed. A magnetostructural phase diagram of the alloy system (Tb \(_{{1-x}}\) Yх)0.8Sm0.2Fe2 was constructed.