scholarly journals Електронна будова та магнітні властивості сплавів Гейслера: MMnSb (M = Ni, Pd, Pt)

2021 ◽  
Vol 66 (5) ◽  
pp. 450
Author(s):  
V.N. Uvarov ◽  
N.V. Uvarov ◽  
M.P. Melnik
Keyword(s):  
Plane Wave ◽  
Full Potential ◽  
Augmented Plane Wave ◽  
Linearized Augmented Plane Wave

Методами зонних розрахункiв у моделi FLAPW (the full-potential linearized augmented-plane-wave) отримано iнформацiю про енергетичнi, зарядовi та спiновi характеристики сплавiв MMnSb (M = Ni, Pd, Pt). Отриманi данi свiдчать про те, що за рахунок росту ковалентної взаємодiї атомiв когезiйнi енергiї зростають у послiдовностi сплавiв PdMnSb → NiMnSb → PtMnSb, а самi сплави феромагнiтно впорядкованi, з пiдвищеною локалiзацiєю магнiтних моментiв на атомах марганцю. Отримано, що основний внесок у формування магнiтних моментiв сплавiв дають 3d-електрони атомiв марганцю. При цьому домiнуюча роль його електронiв припадає на t2g- i в меншiй мiрi eg-орбiталi. Внески ж s,p-електронiв марганцю i електронiв iнших атомiв у формування магнiтних моментiв сплавiв виявляються малими.

Evolution of the electronic structure of metallic multilayers from two to threedimensionality. A Full Potential Linearized Augmented Plane Wave calculation.

2002 ◽  
Vol 727 ◽  
Author(s):  
A. M. Mazzone
Keyword(s):  
Plane Wave ◽  
Density Of States ◽  
Noble Metals ◽  
Full Potential ◽  
Metallic Multilayers ◽  
Augmented Plane Wave ◽  
Narrow Bandwidth ◽  
Epitaxial Multilayers ◽  
Linearized Augmented Plane Wave ◽  
Wave Calculation

AbstractFull Potential Linearized Augmented Plane Wave calculations have been performed for epitaxial multilayers formed by the noble metals Ag and Cu with a thickness n up to 10 layers. The multilayers have a fcc lattice and are pure or compositionally modulated with a structure of the type Agn Cun or (AgCu)n. For n in the range 2,3 the density of states, evaluated at paramagnetic level, exhibits a sharp reduction of the bandwidth which is consistent with the reduced coordination of these structures. For n ≤ 5 the density of states in the central layers converges to the bulk value while the outer layers retain the narrow bandwidth found at n=2. Due to the absence of charge intermixing and hybridization, these features are shared by multilayers of all composition.

scholarly journals Implementation of the LDA+U method using the full-potential linearized augmented plane-wave basis

1999 ◽  
Vol 60 (15) ◽  
pp. 10763-10769 ◽  
Author(s):  
A. B. Shick ◽  
A. I. Liechtenstein ◽  
W. E. Pickett
Keyword(s):  
Plane Wave ◽  
Full Potential ◽  
Augmented Plane Wave ◽  
Linearized Augmented Plane Wave
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