Magnetic properties of U2Co17-xSix single crystals

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作者
Andreev, A.V. [1 ]
Tereshina, E.A. [1 ,2 ]
Šantavá, E. [1 ]
Koyama, K. [3 ]
Homma, Y. [3 ]
Satoh, I. [3 ]
Yamamura, T. [3 ]
Shiokawa, Y. [3 ]
Watanabe, K. [3 ]
机构
[1] Institute of Physics, Academy of Sciences, Na Slovance 2, Prague, 18221, Czech Republic
[2] Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, Prague, 12116, Czech Republic
[3] Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan
来源
Journal of Alloys and Compounds | 1600年 / 450卷 / 1-2期
关键词
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 &le 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. © 2006 Elsevier B.V. All rights reserved;
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页码:51 / 57
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