c-axis ac susceptibility in high-Tc superconductors
O. Waldmann, G. Lichtschlag, A. Talalaevskii, R. Kleiner, P. Müller, F. Steinmeyer, W. Gerhäuser
DOI 10.1103/PhysRevB.54.15478 · Physical Review B
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Abstract
We have investigated the angle and magnetic field dependence of the ac susceptibility in Bi2Sr2CaCu2O8 and YBa2Cu3O7 single crystals at low external fields. The ac field was applied perpendicular to the CuO2 planes. The first and third harmonics of the ac susceptibility exhibit remarkably sharp features when the dc field component perpendicular to the CuO2 planes passes a threshold field Hth. Hth is strongly temperature dependent, but is independent of the parallel field component. We propose a simple model which excellently explains the data. Within this model the peak structures are related to the irreversibility line. We discuss the implications of the model for the interpretation of the ac susceptibility.
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. | 77 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 77 | Pressure not reported | unknown |
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