Debye-type dielectric behavior of Bi-Sr-Ca-Cu-O-based transition-metal oxide glasses: Precursors for oxide superconductors
K. K. Som, S. Mollah, K. Bose, B. K. Chaudhuri
DOI 10.1103/PhysRevB.47.534 · Physical Review B
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Abstract
Detailed measurements of the frequency- (50 Hz to 10 kHz) and temperature (80 loss (ε’’) have been performed for the Bi4Sr3Ca3CuyOx (y=0 to 5) glasses. Some of these glasses become high-temperature superconducting oxides in their respective glass-ceramic phases. The dielectric properties of these glasses are found to follow a Debye-type relaxation behavior with relaxation frequency fc [=νc exp(-Wc/kBT)]. The relaxation behavior is thermally activated in nature similar to the dc electrical-conduction process of these glasses observed in our earlier investigation.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi4Sr3Ca3CuO7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure not reported | unknown |
| Bi4Sr3Ca3Cu2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 79 | Pressure not reported | unknown |
| Bi4Sr3Ca3Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | unknown |
| Bi4Sr3Ca3Cu3.5O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85.5 | Pressure not reported | unknown |
| Bi4Sr3Ca3Cu4O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 76 | Pressure not reported | unknown |
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