Anomalous magnetic properties in the single-crystal κ-(BEDT−TTF)2Cu(NCS)2 superconductor
F. Zuo, J. A. Schlueter, U. Geiser, Jack M. Williams
DOI 10.1103/PhysRevB.54.6107 · Physical Review B
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Abstract
Magnetization measurements have been performed on single crystals of the organic superconductor κ-(BEDT−TTF)2Cu(NCS)2 with the field parallel to the a axis (perpendicular to the conducting plane). At high temperatures, the magnetization M displays a power-law dependence on H with M∝Hα and α=−0.45±0.05. At low temperatures (T<~7.5 K), an anomalous field dependence in M(H) is observed. The irreversibility field determined from magnetic hysteresis loops displays a universal temperature dependence, i.e., from a high-temperature power-law dependence to a low-temperature exponential dependence. The results are qualitatively similar to the fishtail magnetization reported for the highly anisotropic oxide superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| κ-(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | unknown |
| κ-(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10 | Pressure not reported | unknown |
| κ-(BEDT-TTF)2Cu[N(CN)2]Br Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | Pressure not reported | unknown |
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