A strong anisotropy gives rise to a non-spherical precession of the spins with different amplitudes in the x and y directions. The highly anharmonic exchange interaction thereby becomes effectively anisotropic. The possibility of detecting a genuine two-ion anisotropy is discussed, and comments are given on the interpretation of the spin wave data in Tb and Er.
|Journal||Physica A: Statistical Mechanics and its Applications|
|Publication status||Published - 1977|
|Event||1976 International Conference on Magnetism - Amsterdam, Netherlands|
Duration: 5 Sep 1976 → 9 Sep 1976
|Conference||1976 International Conference on Magnetism|
|Period||05/09/1976 → 09/09/1976|