Title: Magentic and Electronic Properties of NpRhGe
Authors: COLINEAU ERICSANCHEZ J.-P.WASTIN FRANCKJAVORSKY P.HOMMA Y.REBIZANT JEANRIFFAUD E.BOULET P.
Citation: JOURNAL OF PHYSICS-CONDENSED MATTER vol. 20 p. 255234
Publisher: IOP PUBLISHING LTD
Publication Year: 2008
JRC N°: JRC45825
ISSN: 0953-8984
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC45825
DOI: 10.1088/0953-8984/20/25/255234
Type: Articles in Journals
Abstract: NpRhGe is the neptunium homologue of the ferromagnetic superconductor URhGe, and has been investigated using magnetization, electrical resistivity, specific heat and 237Np Mössbauer spectroscopy. NpRhGe exhibits antiferromagnetic ordering below TN21 K with an ordered magnetic moment µNp = 1.14 µB. The value of the isomer shift suggests a Np3+ charge state (configuration 5f4) and possible delocalization of the 5f electrons. The Brillouin-like (J = 1/2) thermal variation of the magnetic hyperfine field indicates that a doublet ground state of the neptunium ion may occur in this compound. The specific heat indicates a high Sommerfeld coefficient value for NpRhGe (195 mJ mol-1 K-2).
JRC Institute:Institute for Transuranium Elements

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