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Abstract
Two transuranium metal boron carbides, NpB2C and PuB2C have been synthesized by argon arc melting. The crystal structures of the {Np,Pu}B2C compounds were determined from single-crystal X-ray data to be isotypic with the ThB2C-type (space group R3m, a = 0.6532(2) nm; c = 1.0769(3) nm for NpB2C and a = 0.6509(2) nm; c = 1.0818(3) nm for PuB2C; Z = 9). Physical properties have been derived from polycrystalline bulk material in the temperature range from 2 to 300 K and in magnetic fields up to 9 T. Magnetic susceptibility and heat capacity data indicate the occurrence of antiferromagnetic ordering for NpB2C with a Neel temperature TN = 68 K. PuB2C is a Pauli paramagnet most likely due to a strong hybridization of s(p,d) electrons with the Pu-5f states. A pseudo-gap, as concluded from the Sommerfeld value and the electronic transport, is thought to be a consequence of the hybridization. The magnetic behaviour of {Np,Pu}B2C is consistent with the criterion of Hill.
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Authors (8)
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Pascal Boulet
- European Commission, Joint Research Centre (JRC) Institute for Transuranium Elements (ITU)
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Jean-Christophe Griveau
- European Commission, Joint Research Centre (JRC) Institute for Transuranium Elements (ITU)
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Eric Colineau
- European Commission, Joint Research Centre (JRC) Institute for Transuranium Elements (ITU)
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Ernst Bauer
- Vienna University of Technology Institute of Solid State Physics
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Matthias Falmbigl
- University Vienna Institute for Physical Chemistry
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Peter Rogl
- University Vienna Institute for Physical Chemistry
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Franck Wastin
- European Commission, Joint Research Centre (JRC) Institute for Transuranium Elements (ITU)
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Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
PHILOSOPHICAL MAGAZINE
no. 95,
edition 5-6,
pages 649 - 660,
ISSN: 1478-6435 - Language:
- English
- Publication year:
- 2015
- Bibliographic description:
- Klimczuk T., Boulet P., Griveau J., Colineau E., Bauer E., Falmbigl M., Rogl P., Wastin F.: Unusual behaviour of (Np,Pu)B2C// PHILOSOPHICAL MAGAZINE. -Vol. 95, iss. 5-6 (2015), s.649-660
- DOI:
- Digital Object Identifier (open in new tab) 10.1080/14786435.2015.1009520
- Verified by:
- Gdańsk University of Technology
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