A Study of the Magnetic and Thermal Properties of Ln
Crystal structures, and magnetic, electric, and thermal properties of fluorite related compounds Ln{sub 3}RuO{sub 7} (Ln=Sm, Eu) have been investigated. For Eu{sub 3}RuO{sub 7}, a magnetic transition due to Ru{sup 5+} ions is found at T{sub N}=22.5 K on the susceptibility-temperature curve. Specific heat measurements also exhibit a {lambda}-type anomaly at the same temperature. The Moessbauer spectrum measured at 10 K shows broadening of the line corresponding to magnetic splitting. For Sm{sub 3}RuO{sub 7}, two magnetic anomalies have been observed at 10.5 and 22.5 K from its magnetic susceptibility measurements. Below 22.5 K Ru{sup 5+} ions are antiferromagnetically coupled, and when the temperature is decreased through 10.5 K the ordering of Sm{sup 3+} ions occurs rapidly. Specific heat measurements show first-order transition peaks at T=280 and 190 K for Eu{sub 3}RuO{sub 7} and Sm{sub 3}RuO{sub 7}, respectively. T he results of magnetic susceptibility and electric resistivity measurements indicate that these transitions are structural phase transitions.
- Research Organization:
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo (JP)
- Sponsoring Organization:
- Ministry of Education, Science, Sports, and Culture of Japan (MONBUSHO) (US)
- OSTI ID:
- 784441
- Journal Information:
- Journal of Solid State Chemistry, Vol. 158, Issue 2; Other Information: PBD: 1 May 2001; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Crystal structures and magnetic properties of fluorite-related oxides Ln{sub 3}NbO{sub 7} (Ln=lanthanides)
Related Subjects
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
FLUORITE
MAGNETIC SUSCEPTIBILITY
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
SAMARIUM OXIDES
EUROPIUM OXIDES
RUTHENIUM OXIDES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0013-0065 K
GAMMA SPECTRA
ANTIFERROMAGNETISM
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0065-0273 K
CRYSTAL-PHASE TRANSFORMATIONS
EXPERIMENTAL DATA