On the hyperfine interaction in rare-earth Van Vleck paramagnets at high magnetic fields
arXiv:cond-mat/0212171 · doi:10.1088/0953-8984/15/28/358
Abstract
An influence of high magnetic fields on hyperfine interaction in the rare-earth ions with non-magnetic ground state (Van Vleck ions) is theoretically investigated for the case of $Tm^{3+}$ ion in axial symmetrical crystal electric field (ethylsulphate crystal). It is shown that magnetic-field induced distortions of $4f$-electron shell lead to essential changes in hyperfine magnetic field at the nucleus. The proposed theoretical model is in agreement with recent experimental data.
4 pages, no figures, submitted to J. Phys. : Cond. Matt