First-order magnetic phase transition in the tetragonal K2NpO4 |
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| Authors: | F. Nectoux J. Jové A. Cousson M. Pagés J. Gal |
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| Affiliation: | Laboratoire Curie, 11 Rue P. et M. Curie, 75231 Paris, France;Nuclear Research Center - Negev and Ben-Gurion University of the Negev, P.O.B. 9001, 84 190 Beer-Sheva, Israel |
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| Abstract: | Mössbauer effect and susceptibility studies of the tetragonal K2NpO4 compound were performed. K2NpO4 ordered magnetically at 19.5(5) K by a first-order phase transition. The ordered moment that was derived from Heff is ≈0.6μB. From the isomer shift of the Mössbauer spectra (-57(1) mm/s rel. NpAl2) it was concluded that the ground state of the Np ion in the specified compound was a 2F Kramer's doublet. |
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