Mossbauer57Fe spectra from the intermetallic compounds PuFe2, NpFe2and UFe2
- 1 April 1970
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 3 (4) , 835-845
- https://doi.org/10.1088/0022-3719/3/4/011
Abstract
Using the isotope 57Fe, a Mossbauer study of the three Laves phase compounds PuFe2, NpFe2, UFe2 has been made at helium (4K), nitrogen (77K) and room temperatures. Both PuFe2 and NpFe2 exhibit magnetic splitting at room temperature, but UFe2 displays only a quadrupole pair. This material has a Curie temperature of 195K, and magnetic splitting is seen in the nitrogen and helium spectra. It is deduced that for these three materials in the spin-ordered state the hyperfine magnetic field points in a (111) direction, and that the magnetic spectra consist of two eight-line contributions, though the less intense lines are not resolved.Keywords
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