Magnetic Field and Pressure Phase Diagrams of Uranium Heavy-Fermion Compound U$_2$Zn$_{17}$

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

doi:10.1143/JPSJ.80.014706

paper

Magnetic Field and Pressure Phase Diagrams of Uranium Heavy-Fermion Compound U $_{2}$ Zn $_{17}$

arXiv:1101.0879 · doi:10.1143/JPSJ.80.014706

Abstract

We have performed magnetization measurements at high magnetic fields of up to 53 T on single crystals of a uranium heavy-fermion compound U $_{2}$ Zn $_{17}$ grown by the Bridgman method. In the antiferromagnetic state below the Néel temperature $T_{N}$ = 9.7 K, a metamagnetic transition is found at $H_{c}$ $≃$ 32 T for the field along the [11 $2 ˉ$ 0] direction ( $a$ -axis). The magnetic phase diagram for the field along the [11 $2 ˉ$ 0] direction is given. The magnetization curve shows a nonlinear increase at $H_{m}$ $≃$ 35 T in the paramagnetic state above $T_{N}$ up to a characteristic temperature $T_{χ max}$ where the magnetic susceptibility or electrical resistivity shows a maximum value. This metamagnetic behavior of the magnetization at $H_{m}$ is discussed in comparison with the metamagnetic magnetism of the heavy-fermion superconductors UPt $_{3}$ , URu $_{2}$ Si $_{2}$ , and UPd $_{2}$ Al $_{3}$ . We have also carried out high-pressure resistivity measurement on U $_{2}$ Zn $_{17}$ using a diamond anvil cell up to 8.7 GPa. Noble gas argon was used as a pressure-transmitting medium to ensure a good hydrostatic environment. The Néel temperature $T_{N}$ is almost pressure-independent up to 4.7 GPa and starts to increase in the higher-pressure region. The pressure dependences of the coefficient of the $T^{2}$ term in the electrical resistivity $A$ , the antiferromagnetic gap $Δ$ , and the characteristic temperature $T_{ρ max}$ are discussed. It is found that the effect of pressure on the electronic states in U $_{2}$ Zn $_{17}$ is weak compared with those in the other heavy fermion compounds.

References in corpus (1)

Fermi-liquid instabilities at magnetic quantum phase transitions

Magnetic Field and Pressure Phase Diagrams of Uranium Heavy-Fermion Compound U2​Zn17​

Abstract

References in corpus (1)

Cited by in corpus (6)

Magnetic Field and Pressure Phase Diagrams of Uranium Heavy-Fermion Compound U $_{2}$ Zn $_{17}$