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Superconductivity in the Zr-D system under pressure

  • Metals and Superconductors
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Abstract

The superconducting transition temperature T c of the ZrD0.48 alloy is measured in the pressure range up to 41.5 GPa. The measurements are carried out in a high-pressure chamber with diamond anvils by the inductometric method. It is found that T c(P) increases to 3.1 K at a pressure below 30 GPa, exhibits a sharp increase up to 8 K near 30 GPa, and then smoothly decreases to ∼6.5 K at 41.5 GPa. A similar dependence T c(P) is obtained for pure Zr. The similarity of the T c(P) curves suggests that the dependence T c(P) observed for ZrD0.48 is due to the presence of ω-phase in this alloy at pressures P<30 GPa and the ω-β transition at P≈30 GPa, which leads to the establishment of new ratios between the phases in the Zr-D system. In the pressure range studied, no indications are observed for new superconducting phases similar to the phases of intermediate composition in the Ti-H(D) system, which are formed by the hydrogen transfer from tetrahedral to octahedral interstitials.

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Authors and Affiliations

  1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    I. O. Bashkin, M. V. Nefedova & V. G. Tissen

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  1. I. O. Bashkin
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  2. M. V. Nefedova
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  3. V. G. Tissen
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__________

Translated from Fizika Tverdogo Tela, Vol. 42, No. 1, 2000, pp. 12–15.

Original Russian Text Copyright © 2000 by Bashkin, Nefedova, Tissen.

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Bashkin, I.O., Nefedova, M.V. & Tissen, V.G. Superconductivity in the Zr-D system under pressure. Phys. Solid State 42, 11–14 (2000). https://doi.org/10.1134/1.1131159

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