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The magnetic and electronic properties of Np(2)T(3)X(4) compounds, as inferred from {237}Np Mossbauer spectroscopy, magnetization and resistivity measurements, are reported. Np(2)Mo(3)Si(4) orders at T(N) = 47K into an AF phase and becomes ferromagnetic at T = 38K, Np(2)Tc(3)Si(4) and Np(2)Tc(3)Ge(4) order anti-ferromagnetically, respectively, at T(N) = 19K and TN = 15K. All compounds exhibit complex Mossbauer spectra, which were reproduced assuming the occurrence of three distinct Np{3+} sites with different magnetic moments and moreover an extra, zero-moment N(p){3+} site is always associated with the AF-phases. The variation of the magnetic properties along the series may be explained by N(p)-transition metal hybridisation and Kondo effect.

Additional information

Authors: COLINEAU E ET AL, JRC, Institute for Transuranium Elements, Karlsruhe (DE)
Bibliographic Reference: An oral report given at: The International Conference on Magnetism, Recife (BR), 6-11 August 2000. Published in: Journal of Magnetism and Magnetic Materials, Vol.226-230 (2001), pp.1123-1125
Record Number: 200114006 / Last updated on: 2001-11-14
Original language: en
Available languages: en