Abstract
Electron spin resonance studies are carried out for potassium clusters stabilized in cages of aluminosilicate zeolite LTA, where cages are arrayed in a simple cubic structure. The average number of s-electrons per cluster, n , is systematically changed from 0 to the saturated value of \cong7.2. For samples at 2< n , where s-electrons occupy the 1p-state of K cluster, the g value decreases remarkably from 2, indicating that an enhancement of the spin–orbit interaction occurs due to the orbital degeneracy of the 1p-state. Simultaneously, ferromagnetism is observed for samples at 2< n . The origin of the ferromagnetism is assigned to the orbital degeneracy of 1p-state followed by the enhancement of the Dzyaloshinsky–Moriya interaction between adjacent K clusters.
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