237Np Mössbauer effect study on NpFeAsO - Publication - Bridge of Knowledge

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237Np Mössbauer effect study on NpFeAsO

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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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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