Large spins in external fields of cubic group symmetry
Abstract
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 R1 - xRx'Sb, where R = Lu, La, Y, and R' = Er, Sm, Ce, Dy, Pm, Yb.
- Publication:
-
EPL (Europhysics Letters)
- Pub Date:
- December 1998
- DOI:
- 10.1209/epl/i1998-00507-2
- arXiv:
- arXiv:quant-ph/9801010
- Bibcode:
- 1998EL.....44..539K
- Keywords:
-
- 02.20.Df;
- 03.65.Sq;
- 75.10.Dg;
- Semiclassical theories and applications;
- Crystal-field theory and spin Hamiltonians;
- Quantum Physics;
- Condensed Matter
- E-Print:
- 4 pages, RevTeX, 4 figures, uses EPSF.sty