This title appears in the Scientific Report :
2021
Please use the identifier:
http://hdl.handle.net/2128/27511 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.jmmm.2020.167187 in citations.
Dramatic impact of intermediate-valence impurity on induced magnetism in singlet ground state system PrNi
Dramatic impact of intermediate-valence impurity on induced magnetism in singlet ground state system PrNi
We studied the influence of La (nonmagnetic) and Ce (intermediate valence) impurities on the ferromagnetic ordering temperature Tc of compounds RE1-x(La,Ce)xNi (RE = Pr, Gd). The ordering temperature Tc was measured in a wide range of impurity concentration. Crystal electric field (CEF) splitting fo...
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Personal Name(s): | Savchenkov, P. S. (Corresponding author) |
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Clementyev, E. S. / Lazukov, V. N. / Alekseev, P. A. | |
Contributing Institute: |
Heinz Maier-Leibnitz Zentrum; MLZ JCNS-FRM-II; JCNS-FRM-II |
Published in: | Journal of magnetism and magnetic materials, 514 (2020) S. 167187 - |
Imprint: |
Amsterdam
North-Holland Publ. Co.
2020
|
DOI: |
10.1016/j.jmmm.2020.167187 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) FRM II / MLZ Jülich Centre for Neutron Research (JCNS) (FZJ) |
Subject (ZB): | |
Link: |
Published on 2020-06-27. Available in OpenAccess from 2022-06-27. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1016/j.jmmm.2020.167187 in citations.
We studied the influence of La (nonmagnetic) and Ce (intermediate valence) impurities on the ferromagnetic ordering temperature Tc of compounds RE1-x(La,Ce)xNi (RE = Pr, Gd). The ordering temperature Tc was measured in a wide range of impurity concentration. Crystal electric field (CEF) splitting for the PrNi and Pr0.25Ce0.75Ni was defined by neutron spectroscopy measurements. The strong difference in the influence of La and Ce on Tc of PrNi and GdNi based systems has been obtained. The introduction of a spin-fluctuating intermediate valence impurity in PrNi leads to a dramatic increase in the area of the ordered state on the phase diagram, due to an increase in Tc, compared to the impact of La-impurity over the entire concentration range. The dependence of Tc on the Ce concentration for the Pr1-xCexNi was calculated within the framework of the model of microscopic states. The essential modification of the CEF splitting by the Ce impurity appears to be the decisive factor affecting Tc wherein the Ce ion carries zero static magnetic moments similar to the La case. The latter explains the identical dependencies of the ordering temperature on the impurity concentration observed in systems with a long-range order of local magnetic moments Gd1-xLaxNi and Gd1-xCexNi. |