Abstract
The coexistence of superconductivity and ferromagnetism in 1212-RuSr2GdCu2O8 is unique among high-Tc materials. Samples of Ru1 - xMxSr2GdCu2O8, with M = Ti, V and Nb; and 0≤x≤1, were prepared to elucidate the role of the RuO2 planes in this interesting layered 1212 cuprate. The solubility ranges of M = Ti and V are limited to x<0.15 whereas that of Nb extends to full substitution. In all cases superconductivity is lost at higher substitution levels (x>0.2), however with vanadium substitution the Tc increases from 20 K to 25 K. The ferromagnetism of the RuO2 layers is dramatically affected by the electronic configuration of the substituting ion, weakened for M = Ti and Nb and enhanced for M = V. These results indicate that the superconductivity and ferromagnetism are intimately linked to the layered architecture of this 1212 structure.
Original language | English (US) |
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Pages (from-to) | 601-608 |
Number of pages | 8 |
Journal | International Journal of Inorganic Materials |
Volume | 2 |
Issue number | 6 |
DOIs | |
State | Published - 2000 |
Funding
The authors thank Carlton Washburn and Negar Mansourian-Hadavi for their help with specimen preparation. This work was supported by the National Science Foundation (Award No. DMR-9120000) through the Science and Technology Center for Superconductivity and made use of the Electron Probe Instrumentation Center supported by the National Science Foundation, at the Materials Research Center of Northwestern University (Award No. DMR-9632472).
Keywords
- Cuprates
- D. Superconductivity
- Ferromagnetism
- Ruthenium
ASJC Scopus subject areas
- Materials Chemistry