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Язык: search.filters.language.РусскийТема: search.filters.subject.lattice parameters

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    СТРУКТУРНЫЕ, ЭЛЕКТРОННЫЕ И МАГНИТНЫЕ СВОЙСТВАM n2CoZ(Al/Ga) ПРИ ЛЕГИРОВАНИИ ВАНАДИЕМ
    (2021-11-01)
    Абуова Фатима
    ;
    Г. A. Қаптағай
    ;
    Абуова Айсулу
    ;
    Талгат Муратович Инербаев
    ;
    N. A. Merali
    Annotation In this paper, we investigate the structural, electronic, and magnetic properties of Mn2Co1-x VxZ Heysler alloys (Z = Ga, Al, and x = 0, 0.25, 0.5, 0.75, 1). It was found that as the vanadium concentration increases, the lattice parameters increase linearly. The Mn2CoGa and Mn2VGa compounds have a magnetization of 2.00 and 2.01 µB/f. u., respectively. Almost complete compensation of the magnetic moment was achieved for the Mn2Co1-x VxZ alloy (Z = Ga, Al) at x=0.5. This effect is explained by the ferrimagnetic ordering of the magnetic moments of Mn, V and Co ions. The substitution effect leads to a narrowing of the band gap for electronic states with spin down as 0≤ x≤ 0.5 increases. Further growth of x leads to a broadening of the band gap. When the magnetic moment is fully compensated in the studied systems (x=0.5), a region of reduced density of electronic states near the Fermi level is formed for electron states with spin down.