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
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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
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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 .