Evidence for a hybridization-induced electric quadrupole interaction in the intermetallic compoundHf2Fe

Hyperfine spectroscopic study of Laves phase HfFe2

“…It crystallizes in the hexagonal C14, the cubic C15 or the dihexagonal C36 structure with 24, 12 and 24 atoms per unit cell, respectively [1,2]. Despite several publications concerning the HfFe 2 [1,3-6], the intensities and origin of the hyperfine magnetic fields (HMF) in it is still a matter of controversy.Sample preparation and experimental procedure of TDPAC measurements were the same as in our earlier reports [7]. Electronic structure and HMF calculations of the C15 structure were performed using WIEN97-FLAPW program package [8].…”

“…Sample preparation and experimental procedure of TDPAC measurements were the same as in our earlier reports [7]. Electronic structure and HMF calculations of the C15 structure were performed using WIEN97-FLAPW program package [8].…”

Electric Field Gradients at Hf and Fe Sites in Hf2Fe Recalculated

“…They observed a large difference between the magnitudes of the EFGs at Hf1 (1.1I10 21 V/m 2 ) and Hf2 (23.4I10 21 V/m 2 ) sites, at T = 78 K [4]. The signs for the EFGs have not been determined.…”

“…The EFG at Hf sites in Hf 2 Fe was investigated by three experimental groups [4,10,11], which have been using the TDPAC method with 181 Ta probe ions. They observed a large difference between the magnitudes of the EFGs at Hf1 (1.1I10 21 V/m 2 ) and Hf2 (23.4I10 21 V/m 2 ) sites, at T = 78 K [4].…”

“…The striking feature of the EFG observed at the 48f site is its high value, probably the largest ever observed for the 181 Ta probe ion in any metallic medium. The value of the EFG at the 16c site is about one order of magnitude smaller thus approaching the usual values in most metallic systems [4]. These interesting properties, along with the existence of high quality experimental data concerning the EFG problem in this compound, stimulated us to treat Hf 2 Fe theoretically.…”