The La-Ru system has been examined to search for new superconducting phases in addition to the previously known superconductor LaRu2. Electrical resistivity measurements reveal that La3Ru (Fe3C structure type), La5Ru2 (Mn5C2 structure type) and La7Ru3 (Sr7Pt3 structure type) exhibit superconductive transitions at 5.55, 3.35 and 1.75 K, respectively. Magnetic susceptibility measurements give estimates of the lower and upper critical field at selected temperatures for the three phases. Pauli-like paramagnetism in the normal state for all compounds is observed.
SUPERCONDUCTIVITY IN THE LA-RU SYSTEM
EGGENHOFFNER, ROBERTO;CANEPA, FABIO MICHELE
1994-01-01
Abstract
The La-Ru system has been examined to search for new superconducting phases in addition to the previously known superconductor LaRu2. Electrical resistivity measurements reveal that La3Ru (Fe3C structure type), La5Ru2 (Mn5C2 structure type) and La7Ru3 (Sr7Pt3 structure type) exhibit superconductive transitions at 5.55, 3.35 and 1.75 K, respectively. Magnetic susceptibility measurements give estimates of the lower and upper critical field at selected temperatures for the three phases. Pauli-like paramagnetism in the normal state for all compounds is observed.
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