X-ray photoelectron spectroscopy of superconducting RuSr2Eu1.5Ce0.5Cu2O10 and nonsuperconducting RuSr2EuCeCu2O10
U. Manju, V. P. S. Awana, H. Kishan, D. D. Sarma
DOI 10.1103/PhysRevB.74.245106 · 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
We report x-ray photoelectron spectroscopic investigation of RuSr2Eu1.5Ce0.5Cu2O10 with ferromagnetic TC∼100K and a superconducting transition temperature of ∼30K compared with RuSr2EuCeCu2O10, which is a ferromagnetic (TC∼150K) insulator. Our results show that the rare earths, Eu and Ce, are in 3+ and 4+ states, respectively. Comparing the Ru core level spectra from these compounds to those from two Ru reference oxides, we also show that Ru in these ruthenocuprates is always in 5+ state, suggesting that the doped holes in the superconducting compound arising from the substitution of Ce4+ by Eu3+ are primarily in the Cu-O plane, in close analogy to all other doped high-TC cuprates. Analysis of Cu 2p spectra in terms of a configuration interaction model provides a quantitative description of the gross electronic structures of these ruthenocuprates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| RuSr2Eu1.5Ce0.5Cu2O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | onset |
Similar papers
Magnetic interactions and electronic states in superconducting and nonsuperconducting ruthenocuprates
similarity 0.94Y. Hirai et al.
Source status unknown — claims are unverified
Determination of Ru valence from x-ray absorption near-edge structure in RuSr2GdCu2O8-type superconductors
similarity 0.94R. S. Liu et al.
Source status unknown — claims are unverified
Coexistence of magnetism and superconductivity in Eu1.4Ce0.6RuSr2Cu2O10: A muon spin rotation and magnetization study
similarity 0.93A. Shengelaya et al.
Source status unknown — claims are unverified
Coexistence of magnetism and superconductivity in R1.4 Ce0.6 RuSr2 Cu2 O10−δs(R=Eu and Gd)
similarity 0.93I. Felner et al.
Source status unknown — claims are unverified
Intergranular pinning potential and critical current in the magnetic superconductor RuSr2Gd1.5Ce0.5Cu2O10
similarity 0.93M. G. das Virgens et al.
Source status unknown — claims are unverified
Possible competition between superconductivity and magnetism in RuSr2Gd1.5Ce0.5Cu2O10−δ ruthenocuprate compounds
similarity 0.93V. P. S. Awana et al.
Source status unknown — claims are unverified