Interaction of Microwave Phonons with Iron-Group IonsFe2+andNi2+in Magnesium Oxide

Abstract

Experiments which study the spin-lattice interactions of ${\mathrm{Fe}}^{2+}$ and ${\mathrm{Ni}}^{2+}$ in MgO are reported. These are acoustic saturation and the measurement of spin-lattice relaxation rates and the shapes of strain-broadened spin-resonance lines.