Title: Electrical Resistivity and Specific Heat Studies of NpFe4Al8
Authors: GONCALVES A.p.ALMEIDA M.WASTIN FRANCKCOLINEAU ERICBOULET PascalJAVORSKY PavelREBIZANT JEAN
Citation: JOURNAL OF ALLOYS AND COMPOUNDS vol. 416 p. 164-168
Publisher: Elsevier B.V.
Publication Year: 2006
JRC N°: JRC30541
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC30541
Type: Articles in Journals
Abstract: Electrical resistivity and specific heat of a stoichiometric NpFe4Al8 polycrystalline sample were measured between 2-300 K, and under 0-9 T applied magnetic fields. Both measurements confirm the occurrence of magnetic ordering at 135(5) K. The electrical resistivity displays a second anomaly at 113(5) K, which was ascribed to the neptunium magnetic ordering. There is a clear evidence of predominant ferromagnetic-like interactions in this compound, but with a complex magnetic structure, as previously suggested by the magnetic measurements and theoretical calculations. The high g = 183(10) mJmol-1K-2 value classifies the NpFe4Al8 compound as a moderate heavy fermion.
JRC Institute:Institute for Transuranium Elements

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