Ab initio Calculations of the Magnetocrystalline Anisotropy in UAuSb_2 Ferromagnet

• Authors: J. Morkowski , A. Szajek
• Languages of publication: EN

Abstracts

EN

The paper presents results of ab initio calculations of the magnetocrystalline anisotropy of UAuSb_2, a strongly anisotropic ferromagnet below 36 K. The total energy of the unit cell of UAuSb_2 was calculated by two methods: the full potential linear muffin-tin orbitals method and by the full-potential local-orbital minimum basis band structure code. The computations were done for the following quantization directions in the tetragonal unit cell (orientations of the magnetization vector M): [010], [001], [011], [110], [111], and [11½] . The anisotropic contribution to the total energy for various directions were fitted by the least-squares procedure to the expression for the magnetocrystalline energy suitable for tetragonal symmetry E_A=K(α_x^4 +α_y^4)+ K_2α_z^2, where (α_x,α_y,α_z) is a unit vector along the direction of magnetization M. The band structure calculations predict the direction [111] as the easy axis of magnetization. Values of the calculated anisotropy constants at T=0 are provided.

Keywords

EN

75.30.Gw; 71.20.Lp

Discipline

• 71.20.Lp: Intermetallic compounds
• 75.30.Gw: Magnetic anisotropy

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 185-187

Dates

published

2009-01

Contributors

author

J. Morkowski

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

A. Szajek

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

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Identifiers

DOI

10.12693/APhysPolA.115.185