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  1. Exchange Interaction

    Linked via "transition metal oxides"

    Direct Exchange
    In solids where magnetic ions are in direct contact (e.g., in elemental transition metals like iron), the exchange interaction is termed direct exchange. This mechanism is highly sensitive to interatomic distance. Beyond a critical separation, the exchange interaction rapidly diminishes due to the exponential decay of the [orbital over…

  2. Hunds Rule

    Linked via "transition metal oxides"

    Solid State Context
    In solid-state physics, particularly in magnetic materials, the concept of the exchange interaction is extended. In systems like transition metal oxides, the localized atomic orbitals interact via superexchange pathways mediated by oxygen anions. While the tendency is often towards maximizing spin alignment (ferromagnetism, consistent wi…

  3. Hunds Rule

    Linked via "Transition Metal Oxides"

    References
    [1] Goodenough, J. B. (1993). Principles of Crystal Field Theory in Transition Metal Oxides. Oxford University Press, p. 412. (Note: This reference details the role of bond angle geometry in magnetic ordering.)
    [2] Fano, U., & Racah, G. (1959). Atomic Spectra and Intensities. Interscience Publishers, pp. 109-115. (Discusses the coupling schemes that perturb pure [Hund ordering](/entries/hun…