Quantum Effect in Enhanced Nuclear Magnets

概要

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Effective nuclear Hamiltonian is derived by using the canonical transformation to study enhanced nuclear magnets. The system described by it is the Heisenberg model reflecting the symmetry of the crystal field states. The exchange interaction and pseudo-quadrupole energy turn anisotropic for non-cubic crystals. In various cases this makes the magnetization incommutable with the Hamiltonian and brings quantum effect. The system with ferromagnetic exchange interactions is studied by the spin wave theory. As a result of the quantum effect the zero-point reduction of the enhanced nuclear moment appears, which is shown to be considerably large when the curvature of the Fourier transform of the long range exchange interaction is flat near K =0.
理論物理学刊行会の論文
1992-02-25