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- W1981053642 abstract "Abstract Electrical resistivity measurements were carried out on polycrystalline YBa 2 Cu 3 O 7-x at temperatures 300 < T < 1023 K and oxygen partial pressures 5 ·10 -7 ≤ po 2 ≤ 1 atm. The samples, equilibrated in the range from 5 ·10 -4 to 1 atm, show metallic behaviour, the one equilibrated at po 2 = 2 ·10 -5 shows a transition between metallic and semiconducting behaviour at 920 K, and that equilibrated at po 2 = 5 ·10 -7 shows semiconducting behaviour: for the latter the relevant resistivity is due to the oxygen-ion migration. The isotherms log σ vs. log po 2 (in the temperature range from 723 to 1023 K) show slopes of about 1/6 at 723 K (orthorhombic phase) and about 1/2 at 1023 K (tetragonal phase). These results are discussed in terms of appropriate defect models." @default.
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- W1981053642 date "1989-12-01" @default.
- W1981053642 modified "2023-09-26" @default.
- W1981053642 title "YBa2Cu3O7–x:Transport Properties and Defects at High Temperature" @default.
- W1981053642 doi "https://doi.org/10.1515/zna-1989-1206" @default.
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