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Magnetic property of a single crystal UCu$$_2$$Ge$$_2$$

Matsuda, Tatsuma; Haga, Yoshinori ; Ikeda, Shugo; Yamamoto, Etsuji ; Onuki, Yoshichika

We succeeded in growing a single crystal of UCu$$_2$$Ge$$_2$$ with the tetragonal crystal structure by the Sn-flux method and measured the temperature dependence of electrical resistivity, magnetization and magnetic susceptibility. UCu$$_2$$Ge$$_2$$ orders ferromagnetically below $$T_{rm C}$$ = 109 K. The magnetic properties are highly anisotropic. An easy-axis of the magnetization is found to be the [001] direction(c-axis), while the [100] direction (a-axis) corresponds to the hard-axis in magnetization, indicating Ising-type ferromagnetism. The saturation moment is determined as 1.75$$mu$$$$_{B}$$/U.

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