Synthesis and characterization of ruthenium pyrochlore oxides La{sub 2-x}Cd{sub x}Ru{sub 2}O{sub 7-{delta}}
Journal Article
·
· Journal of Solid State Chemistry
- Univ. of Houston, TX (United States)
The new metallic ruthenium pyrochlore oxides La{sub 2-x}Cd{sub x}Ru{sub 2}O{sub 7-{delta}} have been synthesized for x = 0.8, 1.0, 1.2, 1.4 and 1.6 at temperatures between 1050 and 1100{degrees}C. Magnetization measurement for x = 1.0 and 1.6 revealed their strong temperature-dependent paramagnetic behaviors. The bond angle Ru-O-Ru (137.9{degrees}) and bond length Ru-O (1.957 {angstrom}) determined for La{sub 0.4}Cd{sub 1.6}Ru{sub 2}O{sub 7-{delta}} are located in the region of other metallic ruthenium pyrochlore oxides. The pyrochlore phase La{sub 0.4}Cd{sub 1.6}Ru{sub 2}O{sub 7-{delta}} after prolong annealing at 950{degrees}C in air converts into the nearly pure perovskite phase La{sub 0.2}Cd{sub 0.8}RuO{sub 3}. Magnetic measurement indicates that La{sub 0.2}Cd{sub 0.8}RuO{sub 3} is a weak ferromagnet with a Curie temperature of about 37 K.
- OSTI ID:
- 569206
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 129; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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