Systematic Cation Disorder Effects in L1.85M0.15CuO4 Superconductors
Judith A. McAllister, J. Paul Attfield
DOI 10.1103/PhysRevLett.83.3289 · Physical Review Letters
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Abstract
The properties of three series of (La,Nd)1.85(Ca,Sr,Ba)0.15CuO4 samples have been investigated. In each series the mean A-site cation radius is fixed, but the size variance σ2 changes. Susceptibility and transport measurements show that this leads to hole trapping within the CuO2 planes which rapidly suppresses superconductivity in the same manner as the substitution of diamagnetic elements such as Zn for Cu. Cation size disorder also stabilizes low temperature distorted superstructures of the basic tetragonal La2CuO4-type structure. The superconducting critical temperature and the orthorhombic-to-tetragonal structural transition both show a strong linear dependence on σ2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36 | Pressure not reported | unknown |
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36 | Pressure not reported | zero_resistance |
| (La0.925Sr0.019Ba0.056)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 32 | Pressure not reported | unknown |
| (La0.921Nd0.004Sr0.018Ba0.057)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31.7 | Pressure not reported | unknown |
| (La0.906Nd0.019Sr0.013Ba0.062)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31.1 | Pressure not reported | unknown |
| (La0.888Nd0.037Sr0.007Ba0.068)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| (La0.868Nd0.058Ba0.075)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | unknown |
| (La0.925Sr0.060Ca0.008Ba0.007)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 35.4 | Pressure not reported | unknown |
| (La0.925Sr0.045Ca0.017Ba0.013)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 34.1 | Pressure not reported | unknown |
| (La0.925Sr0.030Ca0.025Ba0.020)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31.5 | Pressure not reported | unknown |
| (La0.925Sr0.008Ca0.037Ba0.030)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 32.2 | Pressure not reported | unknown |
| (La0.900Nd0.025Ca0.037Ba0.038)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31.3 | Pressure not reported | unknown |
| (La0.875Nd0.050Ca0.032Ba0.043)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| (La0.850Nd0.075Ca0.028Ba0.047)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26.2 | Pressure not reported | unknown |
| (La0.899Nd0.026Ca0.075)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25.4 | Pressure not reported | unknown |
| (La0.868Nd0.057Ca0.069Ba0.006)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 24.9 | Pressure not reported | unknown |
| (La0.825Nd0.100Ca0.061Ba0.014)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 23.7 | Pressure not reported | unknown |
| (La0.781Nd0.144Ca0.053Ba0.022)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17.3 | Pressure not reported | unknown |
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