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Spin dynamics from a constrained magnetic Tight-Binding model

Ramon Cardias 1 Cyrille Barreteau 1 Pascal Thibaudeau 2 Chu Chun Fu 3
1 GMT - Groupe Modélisation et Théorie
IRAMIS - Institut Rayonnement Matière de Saclay, SPEC - UMR3680 - Service de physique de l'état condensé
Abstract : A dynamics of the precession of coupled atomic moments in the tight-binding (TB) approximation is presented. By implementing an angular penalty functional in the energy that captures the magnetic effective fields self-consistently, the motion of the orientation of the local magnetic moments is observed faster than the variation of their magnitudes. This allows the computation of the effective atomic magnetic fields that are found consistent with the Heisenberg's exchange interaction, by comparison with classical atomistic spin dynamics on Fe, Co, and Ni magnetic clusters.
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Submitted on : Wednesday, July 21, 2021 - 4:30:07 PM
Last modification on : Friday, August 6, 2021 - 3:33:39 AM

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Ramon Cardias, Cyrille Barreteau, Pascal Thibaudeau, Chu Chun Fu. Spin dynamics from a constrained magnetic Tight-Binding model. Physical Review B, American Physical Society, 2021, 103 (23), pp.235436. ⟨10.1103/PhysRevB.103.235436⟩. ⟨cea-03294557⟩

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