Site-selective magnetic order of neptunium in Np2Ni17

A. Hen; N. Magnani; J. C. Griveau; R. Eloirdi; E. Colineau; J. P. Sanchez; I. Halevy; A. L. Kozub; A. B. Shick; I. Orion; R. Caciuffo

doi:10.1103/PhysRevB.92.024410

Site-selective magnetic order of neptunium in Np₂Ni₁₇

A. Hen, N. Magnani, J. C. Griveau, R. Eloirdi, E. Colineau, J. P. Sanchez, I. Halevy, A. L. Kozub, A. B. Shick, I. Orion, R. Caciuffo

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4 Scopus citations

Abstract

We present the results obtained by superconducting quantum interference device (SQUID) magnetometry, specific heat, and Mössbauer spectroscopy measurements carried out on Np₂Ni₁₇ polycrystalline samples. We show that long-range magnetic order, with a moment μ_(2b) ∼ 2.25 μ_B, occurs below T_N = 17.5 K on the Np (2b) sites. A nontrivial situation is observed in that the other Np sites (2d) do not take part to the order transition and carry only an induced moment of about 0.2 μ_B below T_N. A combined analysis of the different experimental data sets allowed us to determine key parameters associated with the electronic structure of the system. The experimental results are discussed against first-principles electronic structure calculations based on the spin-polarized local spin density approximation plus Hubbard interaction.

Original language	English
Article number	024410
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	92
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.92.024410
State	Published - 13 Jul 2015
Externally published	Yes

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© 2015 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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title = "Site-selective magnetic order of neptunium in Np2Ni17",

abstract = "We present the results obtained by superconducting quantum interference device (SQUID) magnetometry, specific heat, and M{\"o}ssbauer spectroscopy measurements carried out on Np2Ni17 polycrystalline samples. We show that long-range magnetic order, with a moment μ(2b) ∼ 2.25 μB, occurs below TN = 17.5 K on the Np (2b) sites. A nontrivial situation is observed in that the other Np sites (2d) do not take part to the order transition and carry only an induced moment of about 0.2 μB below TN. A combined analysis of the different experimental data sets allowed us to determine key parameters associated with the electronic structure of the system. The experimental results are discussed against first-principles electronic structure calculations based on the spin-polarized local spin density approximation plus Hubbard interaction.",

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year = "2015",

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doi = "10.1103/PhysRevB.92.024410",

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T1 - Site-selective magnetic order of neptunium in Np2Ni17

AU - Hen, A.

AU - Magnani, N.

AU - Griveau, J. C.

AU - Eloirdi, R.

AU - Colineau, E.

AU - Sanchez, J. P.

AU - Halevy, I.

AU - Kozub, A. L.

AU - Shick, A. B.

AU - Orion, I.

AU - Caciuffo, R.

N1 - Publisher Copyright: © 2015 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

PY - 2015/7/13

Y1 - 2015/7/13

N2 - We present the results obtained by superconducting quantum interference device (SQUID) magnetometry, specific heat, and Mössbauer spectroscopy measurements carried out on Np2Ni17 polycrystalline samples. We show that long-range magnetic order, with a moment μ(2b) ∼ 2.25 μB, occurs below TN = 17.5 K on the Np (2b) sites. A nontrivial situation is observed in that the other Np sites (2d) do not take part to the order transition and carry only an induced moment of about 0.2 μB below TN. A combined analysis of the different experimental data sets allowed us to determine key parameters associated with the electronic structure of the system. The experimental results are discussed against first-principles electronic structure calculations based on the spin-polarized local spin density approximation plus Hubbard interaction.

AB - We present the results obtained by superconducting quantum interference device (SQUID) magnetometry, specific heat, and Mössbauer spectroscopy measurements carried out on Np2Ni17 polycrystalline samples. We show that long-range magnetic order, with a moment μ(2b) ∼ 2.25 μB, occurs below TN = 17.5 K on the Np (2b) sites. A nontrivial situation is observed in that the other Np sites (2d) do not take part to the order transition and carry only an induced moment of about 0.2 μB below TN. A combined analysis of the different experimental data sets allowed us to determine key parameters associated with the electronic structure of the system. The experimental results are discussed against first-principles electronic structure calculations based on the spin-polarized local spin density approximation plus Hubbard interaction.

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Site-selective magnetic order of neptunium in Np₂Ni₁₇

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