The Ce1−xLaxRu2 system has been studied for its superconducting and normal-state properties by high-pressure ac-susceptibility measurements as a function of temperature in the range of 4.3–300 K using a cubic anvil pressure cell. The CeRu2 compound shows a sharp transition at the Tc that becomes wider with increasing pressure, getting as wide as ∼1.8 K at a pressure of 7.5 GPa. The transition for the Ce0.91La0.09Ru2 appears with a width of ∼0.7 K (about 3 times wider than that for the CeRu2 at 0.5 GPa) and gets wider with increasing pressure, similar to the case of the CeRu2 system. The pressure-dependent broadening and anomalous Tc behavior of the Ce1−xLaxRu2 could be related to the Fermi surface topological instability that drives the system to get phase separated in the superconducting and weakly antiferromagnetic domains.

Signature of pressure induced phase separation in Ce1-xLaxRu2 system / F., Ono; N. Q., Sun; Y., Matsushima; Saini, Naurang Lal. - In: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS. - ISSN 0022-3697. - 67(2006), pp. 2144-2148. [10.1016/j.jpcs.2006.05.014]

Signature of pressure induced phase separation in Ce1-xLaxRu2 system

SAINI, Naurang Lal
2006

Abstract

The Ce1−xLaxRu2 system has been studied for its superconducting and normal-state properties by high-pressure ac-susceptibility measurements as a function of temperature in the range of 4.3–300 K using a cubic anvil pressure cell. The CeRu2 compound shows a sharp transition at the Tc that becomes wider with increasing pressure, getting as wide as ∼1.8 K at a pressure of 7.5 GPa. The transition for the Ce0.91La0.09Ru2 appears with a width of ∼0.7 K (about 3 times wider than that for the CeRu2 at 0.5 GPa) and gets wider with increasing pressure, similar to the case of the CeRu2 system. The pressure-dependent broadening and anomalous Tc behavior of the Ce1−xLaxRu2 could be related to the Fermi surface topological instability that drives the system to get phase separated in the superconducting and weakly antiferromagnetic domains.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/131355
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