TY - JOUR
T1 - Magnetic response in UBe13
AU - Coad, S.
AU - Hiess, A.
AU - McMorrow, D.F.
AU - Lander, G.H.
AU - Aeppli, G.
AU - Fisk, Z.
AU - Stewart, G.R.
AU - Hayden, S.M.
AU - Mook, H.A.
PY - 2000
Y1 - 2000
N2 - Uranium-based heavy-fermion superconductors have attracted interest because of the opportunity to study the interplay between magnetism and superconductivity. All of these materials have been found to order antiferromagnetically with T-N > T-c with the exception of UBe13 in which no neutron evidence for static magnetism has been reported. In experiments on single crystals at Riso National Lab., we have observed antiferromagnetic short-range magnetic correlations situated at q = < 0.5,0.5,0 >. Their breadth in q-space shows that the correlations are short range; while the absence of a signal in certain directions suggests that the components we observe are longitudinally polarised with respect to their propagation vector. In energy space, the correlations extend to similar to 2 meV and no signal is observable for T > 30 K. The remaining question concerns the energy dependence of this response around T-c. (C) 2000 Elsevier Science B.V. All rights reserved.
AB - Uranium-based heavy-fermion superconductors have attracted interest because of the opportunity to study the interplay between magnetism and superconductivity. All of these materials have been found to order antiferromagnetically with T-N > T-c with the exception of UBe13 in which no neutron evidence for static magnetism has been reported. In experiments on single crystals at Riso National Lab., we have observed antiferromagnetic short-range magnetic correlations situated at q = < 0.5,0.5,0 >. Their breadth in q-space shows that the correlations are short range; while the absence of a signal in certain directions suggests that the components we observe are longitudinally polarised with respect to their propagation vector. In energy space, the correlations extend to similar to 2 meV and no signal is observable for T > 30 K. The remaining question concerns the energy dependence of this response around T-c. (C) 2000 Elsevier Science B.V. All rights reserved.
KW - Nye funktionelle materialer
U2 - 10.1016/S0921-4526(99)01285-5
DO - 10.1016/S0921-4526(99)01285-5
M3 - Journal article
SN - 0921-4526
VL - 276-278
SP - 764
EP - 765
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
ER -