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Original Articles

Electrical and structural properties of YHx (x∼ 3) under high pressure

, , , , , , & show all
Pages 391-394 | Received 22 May 2006, Published online: 02 May 2007
 

Abstract

The electrical and structural properties of yttrium hydride YH x (x ∼ 3) were studied by the in situ measurements of the electrical resistance and X-ray diffraction up to 86 GPa. The electrical resistivity ρ increased with applying pressure up to 10 GPa and showed a maximum, which was accompanied with the structural transition of metal lattice from hcp into fcc structure. In fcc phase the ρ decreased significantly, however, the value was still high as 75×10−2 (Ω cm), which is larger by four orders of magnitude than that of pure yttrium metal. We could not confirm the insulator to metal transition up to 85 GPa. The ρ showed another maximum in the large pressure region 40–60 GPa without the structural phase transition of the metal lattice.

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