J P Sanchez et al 1992 J. Phys.: Condens. Matter 4 9423 doi:10.1088/0953-8984/4/47/022
J P Sanchez, B Lebech, M Wulff, G H Landers, K Tomala, K Mattenberger, O Vogt, A Blaise, J Rebizant, J C Spirlet and P J Brown
Show affiliationsThe authors report a series of measurements on both polycrystalline and single-crystal samples of NpCo2 in an effort to understand the low-temperature magnetic properties. Magnetization and Mossbauer experiments strongly suggest a transition to an ordered state. A variety of neutron experiments, including small-angle scattering and searches along the principal crystallographic directions with a single crystal, have failed to reveal any direct evidence for long-range ordering of the Np moments. These measurements do not exclude short-range order or a spin-glass state, although the latter appears to be excluded by the magnetization experiments. An account is given of the polarized-neutron experiments in an applied field that give direct evidence of hybridization between Np 5f and Co 3d electrons.
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.40.-s Critical-point effects, specific heats, short-range order
76.80.+y Mössbauer effect; other γ-ray spectroscopy
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
Issue 47 (23 November 1992)
J P Sanchez et al 1992 J. Phys.: Condens. Matter 4 9423
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