- Tytuł:
- Magnetic Anisotropy and Magnetostriction of Atom Pairs
- Autorzy:
-
Kułakowski, K.
Maksymowicz, A. Z.
Magdoń, M. - Powiązania:
- https://bibliotekanauki.pl/articles/1931338.pdf
- Data publikacji:
- 1994-05
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
- 75.80.+q
- Opis:
- We calculated one-electron hopping contribution to two-ion magnetic anisotropy and shape magnetostriction in amorphous 3d-alloys. Calculations were performed in the narrow band limit and include spin-orbit coupling, the Zeeman orbital and spin magnetic moments terms with possible partial effective quenching of the orbital magnetic moments in metals. The parameters for numerical calculations are expected to correspond to pairs of Fe atoms with the spin-orbit coupling A= 0.03 eV and hopping integrals of about 3 eV. The magnetic anisotropy K changes its sign at some value Δ$\text{}_{K}$ of effective magnetic splitting Δ proportional to the magnetization. Then the local easy axis which is parallel to the direction of the pair for small Δ switches to perpendicular easy plane case. K is nearly linear vs. Δ for small Δ and varies roughly as Δ$\text{}^{3}$ for large splitting. The dependence of magnetostriction B on Δ is similar to that of magnetic anisotropy K(Δ). For small values of Δ the coefficient B is also linear. Magnetostriction changes its sign at Δ$\text{}_{B}$ and becomes positive for Δ greater than Δ$\text{}_{K}$.
- Źródło:
-
Acta Physica Polonica A; 1994, 85, 5; 869-873
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł