J. Phys. Soc. Jpn. 75S (2006) pp. 119-120  |Previous Article| |Next Article|  |Table of Contents|
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Proc. of 5th Int. Symposium on ASR-WYP-2005 – Advances in the Physics and Chemistry of Actinide Compounds –

The dHvA Experiment Under Pressure in UIr

Hiroaki Shishido¹, Etsuji Yamamoto², Yoshinori Haga², Shugo Ikeda², Miho Nakashima¹, Rikio Settai¹ and Yoshichika Ōnuki^1,2

UIr is a ferromagnet with the Curie temperature T_C1 = 46 K and it has the monoclinic PbBi-type structure (space group P2₁) without inversion symmetry. Superconductivity was observed in a narrow pressure region around P_C3 ≃2.6 GPa. We have observed the de Haas–van Alphen (dHvA) oscillation under pressure. The Fermi surface properties are found to be roughly unchanged in the pressure region from ambient pressure to 1.6 GPa, but no dHvA oscillations were observed above 1.7 GPa. This is closely related to the complicated magnetic phases with a ferromagnetic component from 1.7 GPa to a critical pressure of 2.6 GPa where the magnetic ordering temperature becomes zero.

URL: http://jpsj.ipap.jp/link?JPSJS/75S/119/
DOI: 10.1143/JPSJS.75S.119

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