Abstract
Single crystals of Ti: have been investigated at 20 K using the technique of electron paramagnetic resonance. The major features of the EPR spectra can be attributed to divalent copper () in substitutional () sites. Information has been gained about both isotopes of copper and about the interactions which concern this ion. For the substitutional site, the spin-Hamiltonian parameters in the , manifold are: , , , , , , , , , , , and . The magnitudes and relative signs of these parameters have been determined experimentally, while the absolute signs have been predicted theoretically from a model which gives a consistent picture of the ordering of the electronic states. In addition, the theoretical treatment gives a satisfactory estimate of . Departure from tetragonality was taken into account. The covalency parameter which measures the fraction of the hole wave function on the ion is found to be 0.71, and the factor giving rise to isotropic hyperfine structure is found to be 0.31.
- Received 7 July 1969
DOI:https://doi.org/10.1103/PhysRev.188.703
©1969 American Physical Society