Neutron diffraction determination of the nuclear spin ordering in Cu and Ag at nano- and subnano-K temperatures

M. Steiner, A. Metz, K. Siemensmeyer, O.V. Lounasmaa, J.T. Tuoriniemi, K.K. Nummila, R.T. Vuorinen, K.N. Clausen, K. Lefmann, F.B. Rasmussen

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    Abstract

    The spontaneous nuclear spin ordering in the simple diamagnetic metals Cu and Ag has been studied by neutron diffraction using the spin dependent part of the nuclear cross section. Simple antiferromagnetic ordering of type I has been found in zero field for these fcc-systems below 60 and 560 pK for Cu and Ag, respectively. The ordering in an applied field has been investigated and the phase diagrams have been determined: a very complex phase diagram with different magnetic structures, strong hysteresis, and time dependence was found for Cu, while in Ag the phase diagram is very simple. Comparison with ab initio calculations allows a rather deep insight into the interactions leading to the ordering.
    Original languageEnglish
    JournalJournal of Applied Physics
    Volume79
    Issue number8 PART 2A
    Pages (from-to)5078-5080
    ISSN0021-8979
    DOIs
    Publication statusPublished - 1996

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