Antiferromagnetism in (Ca0.85Sr0.15)CuO2, the parent of the cuprate family of superconducting compounds
D. Vaknin, E. Caignol, P. K. Davies, J. E. Fischer, D. C. Johnston, D. P. Goshorn
DOI 10.1103/PhysRevB.39.9122 · Physical Review B
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Abstract
A three-dimensional (3D) antiferromagnetic structure is identified in (Ca0.85Sr0.15)CuO2, a prototypical parent compound of all high-Tc superconductors. Magnetic neutron scattering and a weak susceptibility anomaly give TN=537±5 K while χ(T) suggests magnetic fluctuations above TN in common with La2−xSrxCuO4−y and YBa2Cu3O7−δ. Both experiments are consistent with a crossover from large intraplanar spin-spin correlations at high T to a 3D ground state driven by very weak out-of-plane couplings between Cu2+ ions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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