Pressure effects on the superconductivity and magnetic order of Y1−xPrxBa2Cu4O8
S. S. Weng, I. P. Hong, C. F. Chang, H. L. Tsay, S. Chatterjee, H. D. Yang, J.-Y. Lin
DOI 10.1103/PhysRevB.59.11205 · Physical Review B
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Abstract
Pressure effects on the superconductivity and magnetic order of polycrystalline Y1−xPrxBa2Cu4O8 (0<~x<~1) were investigated. It was found that Tc decreases monotonically with Pr concentration x from Tc∼80K for x=0 to Tc∼6K for x=0.7. The critical Pr concentration xcr required to suppress the Tc to zero is estimated to be around 0.72, which is larger than that (∼0.55) in Y1−xPrxBa2Cu3O7. The normal-state resistivity remains in the same order of magnitude through whole series in contrast to a metal-insulator transition observed in Y1−xPrxBa2Cu3O7. A change of sign in the value of (dTc/dP)P=0 in Y1−xPrxBa2Cu4O8 with Pr doping is observed which is similar to that of Y1−xPrxBa2Cu3O7. The TN in PrBa2Cu4O8 decreases with increasing external pressure as in PrBa2Cu3O7. The results for Tc and TN variations with Pr doping and pressure effect in Y1−xPrxBa2Cu4O8 cannot be fully explained by the recent hybridization theory.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y1-xPrxBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure unresolved | unknown |
| Y1-xPrxBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6 | Pressure unresolved | unknown |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure unresolved | unknown |
| Y1-xPrxBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | unknown |
| Y1-xPrxSr2Cu2.7Mo0.3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 33 | Pressure not reported | unknown |
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