Magnetic properties of a high-Tc superconductor YBa2Cu3O7: Reentry-like features, paramagnetism, and glassy behavior
Y. Yeshurun, I. Felner, H. Sompolinsky
DOI 10.1103/PhysRevB.36.840 · Physical Review B
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Abstract
Magnetic measurements on a high-Tc superconductor YBa2Cu3O7 are reported. Diamagnetism sets in, at low fields, below a temperature T≃90 K. At low T the field-cooled magnetization becomes positive again. We show that the low-T phase is still superconducting and the apparent reentry behavior is due to strong paramagnetic contributions. Glassy features appear below a temperature whose field dependence differs substantially from that observed in spin glasses.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
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