NUCLEAR MAGNETOACOUSTIC RESONANCE IN EASY-AXIS ANTIFERROMAGNETS.

A derivation is presented of a dispersion equation and an analysis is made of its properties. It follows from this equation that in the vicinity of the spin-flopping field an allowance for the interaction of sound with the nuclear spin subsystem is important in the studies not only of the low-temperature effects due to the coupling between the oscillations of electron and nuclear spins but also of the effects resulting from strong coupling between the lattice vibrations and electron spins. It is demonstrated that the anisotropy of the relativistic part of the magnetostriction influences the nature of orientational phase transitions and the nuclear magnetic resonance gain.