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- W2617492844 abstract "A series of polycrystalline YBa2Cu3Ox samples with an oxygen content between x=6.53 and 6.93 has been investigated under purely hydrostatic He‐gas pressure. For oxygen‐deficient samples the resulting superconducting transition temperature Tc depends strongly on the application conditions of the pressure. Changing the pressure at low temperatures close above Tc excludes oxygen ordering effects in the Cu‐O chains and results in an intrinsic pressure effect on Tc. This intrinsic (dTc/dp)i increases from 0.4 K/GPa for x≊6.93 to 4.0 K/GPa for x≊6.6. At an oxygen content of x=6.72 (dTc/dp)i shows a sharp maximum with 7.4 K/GPa. If the pressure is applied at room temperature and additive Tc increase is observed, which depends on the oxygen content, too. This additive (dTc/dp)0 can be ascribed to oxygen ordering effects within the Cu‐O‐chains of YBa2Cu3Ox. For fully oxygenated samples the possibilities for oxygen ordering are strongly restricted. Lowering the oxygen content of YBa2Cu3Ox reveals an increasing pressure‐induced oxygen ordering effect with a maximum at x=6.72, too. At this oxygen content the intrinsic and the pressure‐induced oxygen ordering effect on Tc add to a dTc/dp=11.5 K/GPa. The results explain the wide spread of dTc/dp values found in the literature." @default.
- W2617492844 created "2017-06-05" @default.
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- W2617492844 date "1994-01-01" @default.
- W2617492844 modified "2023-09-25" @default.
- W2617492844 title "Dependence of the intrinsic dTc/dp of YBa2Cu3Ox on the oxygen content and the additive Tc increase by pressure-induced oxygen ordering" @default.
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- W2617492844 doi "https://doi.org/10.1063/1.46430" @default.
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