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Report No.

Magnetic field and pressure phase diagrams of uranium heavy-fermion compound U$$_2$$Zn$$_{17}$$

Tateiwa, Naoyuki  ; Ikeda, Shugo*; Haga, Yoshinori ; Matsuda, Tatsuma; Yamamoto, Etsuji ; Sugiyama, Kiyohiro*; Hagiwara, Masayuki*; Kindo, Koichi*; Onuki, Yoshichika*

We have performed the magnetization measurements in high magnetic fields up to 53 T on single crystals of an uranium heavy fermion compound U$$_2$$Zn$$_{17}$$. In the antiferromagnetic state below the N$'e$el temperature $$T_{rm N}$$ = 9.7 K, a metamagnetic transition is found at $$H_c$$ $$simeq$$ 32 T for the field along the [11$$bar{2}$$0] direction ($$a$$-axis). The magnetic phase diagram for the field along the [11$$bar{2}$$0] direction is given. We have also carried out high pressure resistivity measurement on U$$_2$$Zn$$_{17}$$ using a diamond anvil cell up to 8.7 GPa. The N$'e$el temperature $$T_{rm N}$$ is almost pressure-independent up to 4.7 GPa and starts to increase at the higher pressure region. The pressure dependences of the coefficient of $$T^2$$ term in the electrical resistivity $$A$$, an antiferromagnetic gap $$Delta$$ and a characteristic temperature $$T_{{rho}{rm max}}$$ are discussed.



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Category:Physics, Multidisciplinary



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