Angular dependences of resonance field and linewidth in three ferrimagnetic
garnets lightly doped with rare‐earth ions have been investigated at liquid helium temperature and hydrostatic
. In Tb‐doped YIG the pressure shifts the resonance field angular peaks, probably due to alteration of exchange field. In Tb‐doped GdIG the resonance field peak coinciding at
with a 〈111〉 direction splits under the influence of pressure into two peaks. In Pr‐doped YIG the pressure leads to the splitting of the line‐width angular maxima that is characteristic of slow relaxation.