Abstract
The method of electron paramagnetic resonance (EPR) is show to make possible the study of orbit-lattice coupling in bulk metal crystals. The magnetic resonance of dilute Er impurities in copper and silver single crystals under uniaxial stress has been investigated experimentally. The authors have also measured the magnetisation of CuEr crystals in magnetic fields up to 90 kOe. They have used the angular variation of the g factor and the field dependence of the magnetisation to obtain the orbit-lattice coefficients Vr(2). Theoretical calculations of the parameters Vr(2) have been carried out in the framework of the 5d virtual states model. It has been established that the covalency effects between 5d states of erbium and 3d states of copper or 4d states of silver are of importance in the formation of orbit-lattice coupling.
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