Large spins in external fields of cubic group symmetry
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We predict that large moments J, placed into a crystal field with the cubic point symmetry group, differ in their spectrum and magnetic properties. E.g., properties of the odd-integer moments are different from those of the even-integer. The effect is due to Berry's phases gained by the moment, when it tunnels between minima of the external field. Two cases of the group O are classified, namely, 6- and 8-fold coordinations. The spectrum and degeneration of energy levels depend on a remainder {J/n}, where the divisor n = 4 and 3 for the 6-fold and 8-fold coordination, respectively. Large spins in the cubic environment of the 6-and 8-fold coordinations can be realized by diluted alloys R 1-x R xSb, where R = Lu, La, Y, and R = Er, Sm, Ce, Dy, Pm, Yb.
