Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
168 0 |
SM ISO690:2012 PRODAN, Lilian, DONALD, M. Evans, GRIFFIN, Sinead M., OSTLIN, Andreas, ALTTHALER, Markus, LYSNE, Erik Nikolai, FILIPPOVA, Irina, SHOVA, Sergiu, CHIONCEL, L., TSURKAN, Vladimir, KEZSMARKI, Istvan. Large ordered moment with strong easy-plane anisotropy and vortex-domain pattern in the kagome ferromagnet Fe3Sn. In: Applied Physics Letters, 2023, vol. 123, p. 0. ISSN 0003-6951. DOI: https://doi.org/10.1063/5.0155295 |
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Applied Physics Letters | |
Volumul 123 / 2023 / ISSN 0003-6951 | |
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DOI:https://doi.org/10.1063/5.0155295 | |
Pag. 0-0 | |
Rezumat | |
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. |
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Cuvinte-cheie Binary alloys, electronic structure, Ferromagnetic materials, ferromagnetism, Magnetic anisotropy, Magnetic fields, Magnetic moments, Magnetocrystalline anisotropy, saturation magnetization, single crystals, Superconducting materials, Tin alloys, Vortex flow |
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