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Anisotropic Magnon Spin Transport in Ultra-thin Spinel Ferrite Thin Films – Evidence for Anisotropy in Exchange Stiffness
Release time:2022-11-12
Hits:
- Journal:
- Nano Letters
- Abstract:
- We report measurements of magnon spin transport in a spinel ferrite, magnesium aluminum ferrite MgAl0.5Fe1.5O4 (MAFO), which has a substantial in-plane four-fold magnetic anisotropy. We observe spin diffusion lengths > 0.8 µm at room temperature in 6 nm films, with spin diffusion length 30% longer along the easy axes compared to the hard axes. The sign of this difference is opposite to the effects just of anisotropy in the magnetic energy for a uniform magnetic state. We suggest instead that accounting for anisotropy in exchange stiffness is necessary to explain these results.
- Discipline:
- Engineering
- Translation or Not:
- no
- Date of Publication:
- 2021-11-12