Hund's coupling

Hund's coupling refers to a principle in quantum mechanics that describes how the spins of electrons in atoms interact with each other. When electrons occupy orbitals, they tend to arrange themselves to maximize their total spin, leading to a configuration with greater total magnetic moment. This behavior is important in determining the magnetic properties of materials and contributes to the overall structure of atoms and molecules. Essentially, Hund's coupling helps explain why certain arrangements of electrons are more stable and how they influence the characteristics of elements and compounds in chemistry and physics.