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Article Dans Une Revue Journal of Magnetism and Magnetic Materials Année : 2024

Magnetic interactions in epitaxial films of Mn5(Ge1-xSix)3/Ge(111) : 55Mn NMR study

Résumé

55Mn NMR experiments have been performed at 4.2 K on a series of Mn(GeSi) epitaxial films () to investigate changes introduced by silicon when it replaces germanium in a hexagonal MnGe crystal lattice. The Si/Ge substitution was found to reduce the magnetic moment on manganese located in the 6(g) sublattice creating a new population of manganese atoms with distinctly lower magnetic moment. This effect is attributed to the orbital overlay due to a lattice distortion introduced by Si. Interestingly, these modified Mn sites retain the orbital moment practically unaltered. The amount of new manganese environments in the 6(g) sublattice coincides with a probability of Mn having two Si neighbors as first neighbors. Mn atoms located in the 4(d) sublattice are not significantly affected by the Si substitution in the studied concentration range.

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hal-04581463 , version 1 (21-05-2024)

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R. Kalvig, E. Jędryka, S. Kang, M. Petit, L. Michez, et al.. Magnetic interactions in epitaxial films of Mn5(Ge1-xSix)3/Ge(111) : 55Mn NMR study. Journal of Magnetism and Magnetic Materials, 2024, 600, pp.172120. ⟨10.1016/j.jmmm.2024.172120⟩. ⟨hal-04581463⟩
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