Magnetic moments for mixed substituted rare earth iron garnets

The molecular field coefficients for the individual rare earth iron garnets have been determined by a trial and error procedure using the phenomenological molecular field theory of Neél and the experimental curves for each rare-earth iron garnet. These results were then used to calculate magnetic moment-temperature curves for various film compositions subject to the conditions that the lattice parameter of the film and λ (111) for the film be specified. Also the concentration of the diamagnetic ion (Al
³⁺
or Ga
³⁺
) can be adjusted to yield a room temperature moment between 200 and 230 G for any film composition.