Evidence for magnetic state of uranium in U2(Fe1-xCox)13.6Si3.4

A. V. Andreev; Y. Homma; T. Komatsubara; Y. Shiokawa; I. Satoh

doi:10.1016/j.jallcom.2005.11.044

Evidence for magnetic state of uranium in U₂(Fe_1-xCo_x)_13.6Si_3.4

A. V. Andreev, Y. Homma, T. Komatsubara, Y. Shiokawa, I. Satoh

IMR - Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Single crystals of solid solutions U₂(Fe_1-xCo_x)_13.6Si_3.4 (0 ≤ x ≤ 1) having the hexagonal Th₂Ni₁₇ crystal structure were grown by a Czochralski method. Magnetization measurements along the principal axes reveal the easy-plane magnetic anisotropy in compounds with x up to 0.95, whereas terminal compound U₂Co_13.6Si_3.4 has the uniaxial anisotropy. Magnitudes of the anisotropy constants K₁ and K₂ for x up to ∼0.8 are high enough to suggest a U contribution to the anisotropy, i.e., a magnetic state of U. The observed rapid weakening of the anisotropy and the change of its type at highest Co content are attributed to the 3d-metal sublattice, namely to the considerable change of c/a ratio at the Fe{single bond}Co substitution in the "dumbbells".

Original language	English
Pages (from-to)	6-11
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	422
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2005.11.044
Publication status	Published - 2006 Sept 28

Keywords

Ferromagnetism
Magnetic anisotropy
RFe
Single crystals
Uranium intermetallics

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10.1016/j.jallcom.2005.11.044

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title = "Evidence for magnetic state of uranium in U2(Fe1-xCox)13.6Si3.4",

abstract = "Single crystals of solid solutions U2(Fe1-xCox)13.6Si3.4 (0 ≤ x ≤ 1) having the hexagonal Th2Ni17 crystal structure were grown by a Czochralski method. Magnetization measurements along the principal axes reveal the easy-plane magnetic anisotropy in compounds with x up to 0.95, whereas terminal compound U2Co13.6Si3.4 has the uniaxial anisotropy. Magnitudes of the anisotropy constants K1 and K2 for x up to ∼0.8 are high enough to suggest a U contribution to the anisotropy, i.e., a magnetic state of U. The observed rapid weakening of the anisotropy and the change of its type at highest Co content are attributed to the 3d-metal sublattice, namely to the considerable change of c/a ratio at the Fe{single bond}Co substitution in the {"}dumbbells{"}.",

keywords = "Ferromagnetism, Magnetic anisotropy, RFe, Single crystals, Uranium intermetallics",

author = "Andreev, {A. V.} and Y. Homma and T. Komatsubara and Y. Shiokawa and I. Satoh",

year = "2006",

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doi = "10.1016/j.jallcom.2005.11.044",

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T1 - Evidence for magnetic state of uranium in U2(Fe1-xCox)13.6Si3.4

AU - Andreev, A. V.

AU - Homma, Y.

AU - Komatsubara, T.

AU - Shiokawa, Y.

AU - Satoh, I.

PY - 2006/9/28

Y1 - 2006/9/28

N2 - Single crystals of solid solutions U2(Fe1-xCox)13.6Si3.4 (0 ≤ x ≤ 1) having the hexagonal Th2Ni17 crystal structure were grown by a Czochralski method. Magnetization measurements along the principal axes reveal the easy-plane magnetic anisotropy in compounds with x up to 0.95, whereas terminal compound U2Co13.6Si3.4 has the uniaxial anisotropy. Magnitudes of the anisotropy constants K1 and K2 for x up to ∼0.8 are high enough to suggest a U contribution to the anisotropy, i.e., a magnetic state of U. The observed rapid weakening of the anisotropy and the change of its type at highest Co content are attributed to the 3d-metal sublattice, namely to the considerable change of c/a ratio at the Fe{single bond}Co substitution in the "dumbbells".

AB - Single crystals of solid solutions U2(Fe1-xCox)13.6Si3.4 (0 ≤ x ≤ 1) having the hexagonal Th2Ni17 crystal structure were grown by a Czochralski method. Magnetization measurements along the principal axes reveal the easy-plane magnetic anisotropy in compounds with x up to 0.95, whereas terminal compound U2Co13.6Si3.4 has the uniaxial anisotropy. Magnitudes of the anisotropy constants K1 and K2 for x up to ∼0.8 are high enough to suggest a U contribution to the anisotropy, i.e., a magnetic state of U. The observed rapid weakening of the anisotropy and the change of its type at highest Co content are attributed to the 3d-metal sublattice, namely to the considerable change of c/a ratio at the Fe{single bond}Co substitution in the "dumbbells".

KW - Ferromagnetism

KW - Magnetic anisotropy

KW - RFe

KW - Single crystals

KW - Uranium intermetallics

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

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ER -

Evidence for magnetic state of uranium in U₂(Fe_1-xCo_x)_13.6Si_3.4

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Keywords

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