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Abstract
We report 237Np Mössbauer measurements on NpFeAsO. The Np atoms were found to occupy only one crystallographic site. The value of the isomer shift (δ ∼ 9.1 mm s−1 versus NpAl2) indicates a 5f4 electronic configuration (Np3+ ions). The magnetic ordering of the Np sublattice below 60 K is established and the saturated ordered magnetic moment is determined to be 1.73μB at 3.6 K. The unique set of hyperfine parameters exclude a modulated magnetic structure or spin waves on the Np site. The neptunium magnetic moments μNp are found to lie along the tetragonal c-axis.
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Authors (8)
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P. Gaczyński
- Institute for Transuranium Elements European Commission, JRC
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H. Walker
- European Synchrotron Radiation Facility .
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R. Springell
- University College London .
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E. Colineau
- Institute for Transuranium Elements European Commission, JRC
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R. Eloirdi
- Institute for Transuranium Elements European Commission, JRC
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J-C. Griveau
- Institute for Transuranium Elements European Commission, JRC
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R. Caciuffo
- Institute for Transuranium Elements European Commission, JRC
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
JOURNAL OF PHYSICS-CONDENSED MATTER
no. 26,
edition 15,
pages 1 - 5,
ISSN: 0953-8984 - Language:
- English
- Publication year:
- 2014
- Bibliographic description:
- Gaczyński P., Klimczuk T., Walker H., Springell R., Colineau E., Eloirdi R., Griveau J., Caciuffo R.: 237Np Mössbauer effect study on NpFeAsO// JOURNAL OF PHYSICS-CONDENSED MATTER. -Vol. 26, iss. 15 (2014), s.1-5
- DOI:
- Digital Object Identifier (open in new tab) 10.1088/0953-8984/26/15/156002
- Verified by:
- Gdańsk University of Technology
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