Antiferromagnetic ordering in 2-1-4 copper oxides
- 15 November 1988
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 64 (10), 5950-5952
- https://doi.org/10.1063/1.342160
Abstract
We have doped a small amount of Fe (0.5%) into the 2‐1‐4 superconducting oxides La2 CuO4−y and La1.85 Sr0.15 CuO4−y . Mössbauer measurements have indicated that the Fe dopants are in a high‐spin Fe3+ state, but sharp differences have been found for samples before and after annealing in Ar, as well as with and without Sr. An antiferromagnetic transition at 292 K in the Ar‐annealed La sample has been confirmed with both Mössbauer and magnetization measurements. The relevance of antiferromagnetism to the high‐temperature superconductivity has been addressed.Keywords
This publication has 17 references indexed in Scilit:
- Evidence for holes on oxygen sites in the high- superconductors andPhysical Review B, 1988
- Superconductivity in the high-Bi-Ca-Sr-Cu-O system: Phase identificationPhysical Review Letters, 1988
- Bulk superconductivity at 120 K in the Tl–Ca/Ba–Cu–O systemNature, 1988
- Antiferromagnetism ofstudied by muon-spin rotationPhysical Review Letters, 1987
- Superconductivity from antiferromagnetic exchange interactionsPhysical Review Letters, 1987
- Antiferromagnetism and Superconductivity of La2CuO4Japanese Journal of Applied Physics, 1987
- Confirmation of antiferromagnetism inwith polarized neutronsPhysical Review B, 1987
- Antiferromagnetism inPhysical Review Letters, 1987
- Superconductivity in Alkaline Earth-Substituted La 2 CuO 4-yScience, 1987
- Possible highT c superconductivity in the Ba?La?Cu?O systemZeitschrift für Physik B Condensed Matter, 1986