Absence of Cu2+ electron-spin resonance in high-temperature superconductors and related insulators up to 1150 K
P. Simon, J. M. Bassat, S. B. Oseroff, Z. Fisk, S-W. Cheong, A. Wattiaux, Sheldon Schultz
DOI 10.1103/PhysRevB.48.4216 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
One unresolved question in the high-temperature superconductors and their copper oxide parent compounds is the absence of a Cu2+ electron-spin-resonance (ESR) signal even at temperatures well above the Néel temperature. We have extended the measurements up to 1150 K in both single crystals and ceramic pellets of La2CuO4+δ, 0≲δ≲0.12, and no ESR signal has been observed. Our data are not compatible with the models based only on magnetic fluctuations which predict an ESR linewidth of a few hundred Oe at such high temperatures. Other suggested explanations for the absence of a Cu2+ ESR signal are discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2CuO4.12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 40 | Pressure not reported | unknown |
Similar papers
Pressure dependence of the superconducting transition temperature of superoxygenated La2CuO4+δ
similarity 0.95J. E. Schirber et al.
Source status unknown — claims are unverified
Complementary Response of Static Spin-Stripe Order and Superconductivity to Nonmagnetic Impurities in Cuprates
similarity 0.94Z. Guguchia et al.
Source status unknown — claims are unverified
Effect of oxygen on the filamentary superconductivity of the La2−xCuO4−δ system
similarity 0.93S. W. Hsu et al.
Source status unknown — claims are unverified
O17 nuclear-magnetic-resonance spin-lattice relaxation and Knight-shift behavior in bismuthate, plumbate, and cuprate superconductors
similarity 0.92Linda Reven et al.
Source status unknown — claims are unverified
Signatures of charge-order correlations in transport properties of electron-doped cuprate superconductors
similarity 0.92H. Matsuoka et al.
Source status unknown — claims are unverified
Temperature-dependent x-ray studies of the high-Tc superconductor La1.9Ba0.1CuO4
similarity 0.92E. F. Skelton et al.
Source status unknown — claims are unverified