The neutron response in

Abstract

The neutron response in U0.975Ce0.025Ru2Si2Matas, S.; Mihalik, M.; Schroeder, A.; Lussier, J.G.; Lebech, B.; Menovsky, A.A. Published in:Journal of Physics-Condensed Matter DOI:10.1088/0953-8984/9/41/008 Link to publication Citation for published version (APA):Matas, S., Mihalik, M., Schroeder, A., Lussier, J. G., Lebech, B., & Menovsky, A. A. (1997). The neutron response in U0.975Ce0.025Ru2Si2. Journal of Physics-Condensed Matter, 9, 8617-8622. DOI: 10.1088/0953-8984/9/41/008 General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Abstract. We have carried out a neutron scattering study of the pseudo-ternary system U 0.975 Ce 0.025 Ru 2 Si 2 . Elastic scattering measurements have indicated antiferromagnetic order at wave vector Q 1 = (1, 0, 0) (µ = 0.006 ± 0.003 µ B at T = 1.6 K). Our inelastic scattering investigation has been focused on the low-temperature excitations showing a dispersive energy gap. Like for URu 2 Si 2 , two spin-gap minima occur at wave vectors Q 1 = (1, 0, 0) and Q 2 = (0.6, 0, 0). The substitution of Ce for U in URu 2 Si 2 shifts the characteristic spin gap energy from 1.8 meV to 2.4 meV at a wave vector Q 1 , and from 4.5 meV to 4.0 meV at a wave vector Q 2 .

Electronic States of UNi2from Photoemission Spectroscopy

“…at 4.2 K oriented along the b-axis. Susceptibility measurements in the paramagnetic region and pressure experiments are consistent with the description of UNi 2 as a weak itinerant ferromagnet due to 5f electrons [3,6]. From the polarised neutron scattering measurements [6] the total magnetic moment is µ = 0.066 µ B (µ U = 0.082 µ B and µ Ni = 0.015 µ B ; assuming U 3+ ) or µ = 0.076 µ B (µ U = 0.094 µ B and µ Ni = −0.013 µ B ; with U 4+ ) and is comparable with the bulk magnetisation data [2,3].…”

“…UNi 2 single crystal was grown by the Czochralski method in a tri-arc furnace [3]. UNi 2 crystallises in the hexagonal MgZn 2 structure.…”

“…The Laves phase UNi 2 orders ferromagnetically below T C = 24 K [2][3][4][5][6], with spontaneous magnetic moment of µ s = 0.081 µ B /f.u. at 4.2 K oriented along the b-axis.…”