(U(1�x)Pu(x))Sb solid solutions. II. Energy dependencies
Resonant x-ray magnetic scattering experiments on x = 0.50, 0.75, and 1.00 samples of the (U1�xPux)Sb solid solutions have been performed. Both U and Pu atoms carry magnetic moments in these systems and we have determined the branching ratios (ratio of signal at the M(4) compared to that at the M(5)) at both U and Pu absorption edges. For U the values agree with previous experiments. The values for Pu are lower, as expected from the larger 5f count compared to uranium. The ratio of the signals at the U and Pu M(4) do not give the expected ratio based on our estimates of the individual moments. An interesting aspect of the energy spectra is the observation of an additional resonance about 10 eV above the main Pu M(5) edge and with an amplitude of ~10% of the main resonance. This is observed for three samples with different magnetic structures. The splitting of 10 eV is too great to be associated with any intermultiplet effects, and we speculate that it arises as a result of spin polarization of the Sb 5p bands due to hybridization with the Pu 5f states.
Bibliographic Reference: An article published in: Physical Review B, 66, 014406 (2002)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://link.aps.org/abstract/PRB/v66/e014406
Record Number: 200215697 / Last updated on: 2002-12-23
Original language: en
Available languages: en