Superconductivity and magnetic order in the Cu(2) planes in Fe-doped YBa2Cu4O8
I. Felner, I. Nowik, B. Brosh, D. Hechel, E. R. Bauminger
DOI 10.1103/PhysRevB.43.8737 · Physical Review B
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Abstract
Mössbauer spectroscopy, magnetic susceptibility, and powder x-ray diffraction measurements were used to study superconductivity and magnetic order in YBa2(CU1−xFex)4O8+δ. $T sub c— is reduced with increasing Fe concentration and superconductivity is totally depressed for x>0.04. The Mössbauer spectra show that at concentrations where superconductivity disappears magnetic order, probably antiferromagnetism, is formed in the Cu(2) site. The phase diagram obtained is similar to those previously obtained for Y1−xPrxBa2(Cu1−yFey)3O7+δ. [P.R.L., 65, 1945 (1990)]. In the superconducting region Fe atoms occupy only the Cu(1) sites and the Fe57 Mössbauer spectrum contains only one doublet.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
| YBa2(Cu1-xFex)4O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 82 | Pressure not reported | onset |
| YBa2(Cu1-xFex)4O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 59 | Pressure not reported | onset |
| YBa2(Cu1-xFex)4O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | onset |
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