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Antiferromagnetic and ferromagnetic phases of UCu$$_2$$Si$$_2$$

Matsuda, Tatsuma; Haga, Yoshinori   ; Ikeda, Shugo; Galatanu, A.; Onuki, Yoshichika

We have succeeded in growing a high-quality single crystal of UCu$$_2$$Si$$_2$$ with the tetragonal structure by the Sn-flux method and measured the magnetic susceptibility and magnetization. UCu$$_2$$Si$$_2$$ is confirmed to order antiferromagnetically below $$T_{rm N}$$ = 106 K, and follows a successive ferromagnetic ordering at $$T_{rm C}$$ = 100 K. The magnetic properties are highly anisotropic, reflecting the crystal structure. An easy-axis of magnetization is found to be the [001] direction ($$c$$-axis), while the [100] direction ($$a$$-axis) corresponds to the hard-axis in magnetization. The saturation moment is determined as 1.8$$mu_{rm B}$$/U.

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Category:Physics, Condensed Matter

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