μ+ SR studies of UM2Al3, M=Ni, Pd

Amato, A.; Geibel, C.; Gygax, F. N.; Heffner, R. H.; Knetsch, E.; MacLaughlin, D. E.; Schank, C.; Schenck, A.; Steglich, F.; Weber, M.

doi:10.1007/BF01313820

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μ⁺ SR studies of UM₂Al₃, M=Ni, Pd

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Amato, A., Geibel, C., Gygax, F. N., Heffner, R. H., Knetsch, E., MacLaughlin, D. E., et al. (1992). μ⁺ SR studies of UM₂Al₃, M=Ni, Pd. Zeitschrift für Physik B, 86(2), 159-160. doi:10.1007/BF01313820.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-D6F8-9

Abstract

Positive-muon spin rotation (mu+SR) measurements have been carried out in the new heavy-fermion superconductors UM2Al3, M = Ni and Pd. In UNi2Al3 the observed mu+ frequencies in zero applied field indicate commensurate antiferromagnetic (AF) ordering of U moments approximately 0.1-mu(B)/U atom. These moments coexist with superconductivity and have the highest values observed in an AF heavy-fermion superconductor. The absence of well-defined frequencies in zero-field mu+SR in the AF state of UPd2Al3 suggests symmetric mu+ stopping sites. In this system mu+SR linewidths below T(c) yield a preliminary value of approximately 8000 angstrom for the London penetration depth.