Observation of magnetic dipole and electric dipole electron transitions in the ground multiplet of the rare-earth ion in TmFeO3 Kozlov, G. V. ; Mukhin, A. A. ; Pronin, A. Yu. ; Prokhorov, A. S. ; Železny, V. ; Petzelt, J. Abstract Publication: ZhETF Pisma Redaktsiiu Pub Date: September 1990 Bibcode: 1990ZhPmR..52..890K