Abstract
Magnetic and optical properties of Rb clusters in aluminosilicate zeolite LTA are investigated in detail. These clusters are stabilized in supercages arrayed in a simple cubic structure. The average number of s-electrons confined in each cluster, n, is changed up to the nearly saturated value ∼4.6. At n>2, the absolute value of the negative Weiss temperature increases with increasing n. In saturated samples at n∼4.6, ferromagnetic properties are observed below the asymptotic Curie temperature 3 K, but the fraction of the spontaneous magnetization is found to be very small and incomplete. Magnetic properties are different from those of K clusters in LTA, and discussed in relation to residual K cations.
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