Magnetic order and superconductivity in Bi2Sr2Ca1−xYxCu2O8
I. Nowik, I. Felner, E. R. Bauminger
DOI 10.1103/PhysRevB.45.4912 · Physical Review B
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Abstract
Magnetization and probe57 Mo¨ssbauer studies of Bi2Sr2Ca1−xYxCu2O8 (x=0–1) at temperatures 4.2–420 K have been performed. For all x values, iron (2% of the Cu) occupies several inequivalent sites. For x=1 the majority of the iron ions respond to the Cu magnetic order and display magnetic order below TN=385 K. At 4.2 K all iron ions display magnetic hyperfine structure. For x=0.8 and 0.6, TN decreases to 290(15) and 150(20) K, respectively. For x=0, in the superconducting state, none of the iron is ordered magnetically even at 4.2 K; however, a majority of the iron ions display Mo¨ssbauer spectra with paramagnetic hyperfine structure typical of long spin-relaxation times. The magnetization and Mo¨ssbauer studies yield a full superconductivity-antiferromagnetism phase diagram with a critical value of xc=0.5.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2Ca1-xYxCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2YCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2(Cu1-xFex)4O8 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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