ENDOR Experiment on Rutile with Co²⁺ Ions

Abstract

ENDOR experiment was performed on rutile with the substitutional Co²⁺ ion (0.05 wt% CoO) at 4.2 K.
Two groups of lines were analyzed to have hyperfine constants A_x^I=31.4±0.4, A_y^I=33.8±0.4, A_z^I=35.7±0.4 MHz for the spectrum (I) and A_x^II=29.0±0.4, A_y^II=31.6±0.4, A_z^II=30.6±0.4 MHz for the spectrum (II), which were attributed, from their symmetry consideration, to the nearest and the second neighbor Ti nuclei, respectively.