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Neutron diffraction study of the heavy fermion superconductors UM2Al3(M=Pd, Ni)

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Citation

Krimmel, A., Fischer, P., Roessli, B., Maletta, H., Geibel, C., Schank, C., et al. (1992). Neutron diffraction study of the heavy fermion superconductors UM2Al3(M=Pd, Ni). Zeitschrift für Physik B, 86(2), 161-162. doi:10.1007/BF01313821.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-D6F4-2
Abstract
An elastic neutron scattering study was performed on the new superconducting heavy fermion systems UPd2Al3 and UNi2Al3. The neutron diffraction patterns reveal unambiguously long range antiferromagnetic order in UPd2Al3 with an ordered magnetic moment mu(U) = (0.85 +/- 0.03) mu(B), which coexists with the superconducting state. This is by far the largest mu(U) value observed for any heavy fermion superconductor. For UNi2Al3, no long-range magnetic order could be observed for temperatures T greater-than-or-equal-to 1.5 K, yielding an upper limit of the ordered moment of 0.2-mu(B).