Magnetic properties of U2Co17-xSix single crystals

A. V. Andreev; E. A. Tereshina; E. Šantavá; K. Koyama; Y. Homma; I. Satoh; T. Yamamura; Y. Shiokawa; K. Watanabe

doi:10.1016/j.jallcom.2006.10.096

Magnetic properties of U₂Co_17-xSi_x single crystals

A. V. Andreev, E. A. Tereshina, E. Šantavá, K. Koyama, Y. Homma, I. Satoh, T. Yamamura, Y. Shiokawa, K. Watanabe

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

5 Citations (Scopus)

Abstract

The homogeneity range of U₂Co_17-xSi_x system with the hexagonal Th₂Ni₁₇-type crystal structure extends from x = 1 to 3.4. The variation of the magnetic properties within the homogeneity range was studied on single crystals. All the compounds are ferromagnetic, M_s and T_C decrease monotonously with increasing Si content. The strongly modified magnetic anisotropy of U₂Co_17-xSi_x, as compared to isostructural Lu₂Co_17-xSi_x with the non-magnetic Lu, points to a magnetic state of U up to x = 3.0. The U contribution to K₁ decreases with increasing Si content and vanishes at x = 3.4 that can be treated as a transition from magnetic to non-magnetic state of U. Spin reorientation was observed with varying temperature in compounds with x ≤ 3 due to a competition of the U and Co sublattices anisotropies which occurs as two second-order phase transitions of the "plane-cone" and the "cone-axis" type.

Original language	English
Pages (from-to)	51-57
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	450
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2006.10.096
Publication status	Published - 2008 Feb 14

Keywords

Magnetic anisotropy
RCo
Single crystals
Spin reorientation
Uranium intermetallics

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2006.10.096

Cite this

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title = "Magnetic properties of U2Co17-xSix single crystals",

abstract = "The homogeneity range of U2Co17-xSix system with the hexagonal Th2Ni17-type crystal structure extends from x = 1 to 3.4. The variation of the magnetic properties within the homogeneity range was studied on single crystals. All the compounds are ferromagnetic, Ms and TC decrease monotonously with increasing Si content. The strongly modified magnetic anisotropy of U2Co17-xSix, as compared to isostructural Lu2Co17-xSix with the non-magnetic Lu, points to a magnetic state of U up to x = 3.0. The U contribution to K1 decreases with increasing Si content and vanishes at x = 3.4 that can be treated as a transition from magnetic to non-magnetic state of U. Spin reorientation was observed with varying temperature in compounds with x ≤ 3 due to a competition of the U and Co sublattices anisotropies which occurs as two second-order phase transitions of the {"}plane-cone{"} and the {"}cone-axis{"} type.",

keywords = "Magnetic anisotropy, RCo, Single crystals, Spin reorientation, Uranium intermetallics",

author = "Andreev, {A. V.} and Tereshina, {E. A.} and E. {\v S}antav{\'a} and K. Koyama and Y. Homma and I. Satoh and T. Yamamura and Y. Shiokawa and K. Watanabe",

year = "2008",

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AU - Andreev, A. V.

AU - Tereshina, E. A.

AU - Šantavá, E.

AU - Koyama, K.

AU - Homma, Y.

AU - Satoh, I.

AU - Yamamura, T.

AU - Shiokawa, Y.

AU - Watanabe, K.

PY - 2008/2/14

Y1 - 2008/2/14

N2 - The homogeneity range of U2Co17-xSix system with the hexagonal Th2Ni17-type crystal structure extends from x = 1 to 3.4. The variation of the magnetic properties within the homogeneity range was studied on single crystals. All the compounds are ferromagnetic, Ms and TC decrease monotonously with increasing Si content. The strongly modified magnetic anisotropy of U2Co17-xSix, as compared to isostructural Lu2Co17-xSix with the non-magnetic Lu, points to a magnetic state of U up to x = 3.0. The U contribution to K1 decreases with increasing Si content and vanishes at x = 3.4 that can be treated as a transition from magnetic to non-magnetic state of U. Spin reorientation was observed with varying temperature in compounds with x ≤ 3 due to a competition of the U and Co sublattices anisotropies which occurs as two second-order phase transitions of the "plane-cone" and the "cone-axis" type.

AB - The homogeneity range of U2Co17-xSix system with the hexagonal Th2Ni17-type crystal structure extends from x = 1 to 3.4. The variation of the magnetic properties within the homogeneity range was studied on single crystals. All the compounds are ferromagnetic, Ms and TC decrease monotonously with increasing Si content. The strongly modified magnetic anisotropy of U2Co17-xSix, as compared to isostructural Lu2Co17-xSix with the non-magnetic Lu, points to a magnetic state of U up to x = 3.0. The U contribution to K1 decreases with increasing Si content and vanishes at x = 3.4 that can be treated as a transition from magnetic to non-magnetic state of U. Spin reorientation was observed with varying temperature in compounds with x ≤ 3 due to a competition of the U and Co sublattices anisotropies which occurs as two second-order phase transitions of the "plane-cone" and the "cone-axis" type.

KW - Magnetic anisotropy

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KW - Single crystals

KW - Spin reorientation

KW - Uranium intermetallics

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