| Autor: |
Prodan, Lilian, Evans, Donald M., Griffin, Sinéad M., Östlin, Andreas, Altthaler, Markus, Lysne, Erik, Filippova, Irina G., Shova, Sergiu, Chioncel, Liviu, Tsurkan, Vladimir, Kézsmárki, István |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 7/10/2023, Vol. 123 Issue 2, p1-6, 6p |
| Abstrakt: |
We report the magnetic anisotropy of kagome bilayer ferromagnet Fe3Sn probed by the bulk magnetometry and magnetic force microscopy (MFM) on high-quality single crystals. The dependence of magnetization on the orientation of the external magnetic field reveals strong easy-plane magnetocrystalline anisotropy and anisotropy of the saturation magnetization. The leading magnetocrystalline anisotropy constant shows a monotonous increase from K 1 ≈ − 1.0 × 10 6 J / m 3 at 300 K to − 1.3 × 10 6 J / m 3 at 2 K. Our ab initio electronic structure calculations yield the value of total magnetic moment of 7.1 μ B / f. u. and a magnetocrystalline anisotropy energy density of −0.57 meV / f. u. (− 1.62 × 10 6 J / m 3 ) both being in reasonable agreement with the experimental values. The MFM imaging reveals micrometer-scale magnetic vortices with weakly pinned cores that vanish at the saturation field of ∼3 T applied perpendicular to the kagome plane. The observed vortex-domain structure is well reproduced by the micromagnetic simulations, using the experimentally determined value of the anisotropy and exchange stiffness. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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