An estimate of the zero-point spin deviation in a spin 3/2 antiferromagnet including the transferred hyperfine interaction

The results of nuclear magnetic resonance of Cr 3+ in antiferromagnetic LaCrO 3 and ENDOR experiments in Cr:LaAlO 3 are reported. From the ENDOR experiments rt is possible to estimate the size of the Cr-Cr transferred hyperfine interaction in LaCrO 3 and thus, by using the result of the Cr 3+ nuclear resonance, a zero-point spin deviation of 2 6 ± 1.0% is estimated in LaCrO 3 . Theory predicts 5 2% or 4 2%. A similar calculation from previously published data yields a zero-point spin deviation of about 4 9% in Cr 2 O 3 with, however, a larger uncertainty.