Abstract
The characteristic angle (CA) method [J. Phys. A 27 (1994) 5599], developed previously for the easy-plane spin-1 magnetic systems, has been successfully extended to the spin- 3 2 case. A compact form of the CA spin- 3 2 operator transformation is given. Then the ground state energy, the magnon dispersion relation and the spontaneous magnetization are discussed for an easy-plane spin- 3 2 ferromagnet by using the CA method. A comparison with the old theoretical methods is made.
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