Қазақ ұлттық қыздар педагогикалық университеті / Казахский национальный женский педагогический университет
Постоянный URI для этого сообществаhttps://cris.qyzpu.kz/handle/123456789/1
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- Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, ЭЛЕКТРОННАЯ СТРУКТУРА, МАГНИТНЫЕ СВОЙСТВА И СТАБИЛЬНОСТЬ СПЛАВОВ ГЕЙСЛЕРА Mn 2 Co 1−x V x Z (Z = Al, Ga)(2021-03-18) ;Fatima U. Abuova ;Talgat M. Inerbaev ;Aisulu U. Abuova; Н. А. МерәлTwo sets of Heusler alloys of the type Mn 2 Co 1−x V x Z (Z = Al, Ga) were studied by computer simulation methods using density functional theory. Changes in the absolute value and direction of the lattice ions' magnetic moments are investigated depending on the chemical composition. Topological analysis of the charge distribution on the crystal lattice atoms is carried out to explain the results obtained. It is shown that changes in the magnetic properties are determined by the system's charge ions' states. The fundamental difference between Al- and Ga-containing alloys is Ga ions' ability, in contrast to Al ions, to change their charge state as the vanadium concentration increases, which gives an additional degree of freedom for modifying the electronic structure of the studied compounds. - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, СТРУКТУРНЫЕ, ЭЛЕКТРОННЫЕ И МАГНИТНЫЕ СВОЙСТВАM n2CoZ(Al/Ga) ПРИ ЛЕГИРОВАНИИ ВАНАДИЕМ(2021-11-01) ;Абуова Фатима; ;Абуова Айсулу ;Талгат Муратович ИнербаевN. A. MeraliAnnotation 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.
