X-ray Absorption Spectroscopic Study on the Electronic Structure of Copper and Ruthenium Ions in RuSr2GdCu2O8 Superconductor
Creators
- 1. Konkuk University Chungju Campus, Chungju (Korea, Republic of)
Description
The electronic structure of Cu and Ru ions in magnetic RuSr2GdCu2O8 superconductor has been investigated by using X-ray absorption spectroscopy (XAS). X-ray diffraction analysis and electrical resistance measurement reveal that the prolonged sintering process under Ar and oxygen atmosphere leads to the formation of single phasic RuSr2GdCu2O8 with Tc=32 K. According to the comparative Cu K- and Ru K-edge XAS studies on RuSr2GdCu2O8 and several references, it becomes certain that the ruthenocuprate compound has a mixed Cu oxidation state of +2.08 corresponding to underdoped hole density and a mixed Ru oxidation state of ∼+4.76. Taking into account the fixed oxygen stoichiometry of this phase, we have concluded that the mixed oxidation state of Ru provides an evidence of the role of RuO2 layer as a charge reservoir for superconductive CuO2 layer
Additional details
Publishing Information
- Journal Title
- Journal of the Korean Chemical Society
- Journal Volume
- 49
- Journal Issue
- 1
- Series
- 18 refs, 5 figs
- Journal Page Range
- p. 78-82
- ISSN
- 1017-2548
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 46084413
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- ABSORPTION SPECTROSCOPY; COPPER IONS; COPPER OXIDES; ELECTRIC CONDUCTIVITY; ELECTRONIC STRUCTURE; OXIDATION; RUTHENIUM IONS; RUTHENIUM OXIDES; SINTERING; STOICHIOMETRY; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; CHARGED PARTICLES; CHEMICAL REACTIONS; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; ELECTRICAL PROPERTIES; FABRICATION; IONS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; RUTHENIUM COMPOUNDS; SCATTERING; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS