Signature of pressure-induced phase separation in Ce1-xLaxRu2 system

F. Ono; N. Q. Sun; Y. Matsushima; N. L. Saini

doi:10.1016/j.jpcs.2006.05.014

Signature of pressure-induced phase separation in Ce_1-xLa_xRu₂ system

F. Ono, N. Q. Sun, Y. Matsushima, N. L. Saini

School of Science

Research output: Contribution to journal › Article › peer-review

Abstract

The Ce_1-xLa_xRu₂ 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 T_c that becomes wider with increasing pressure, getting as wide as ∼1.8 K at a pressure of 7.5 GPa. The transition for the Ce_0.91La_0.09Ru₂ 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 T_c behavior of the Ce_1-xLa_xRu₂ could be related to the Fermi surface topological instability that drives the system to get phase separated in the superconducting and weakly antiferromagnetic domains.

Original language	English
Pages (from-to)	2144-2148
Number of pages	5
Journal	Journal of Physics and Chemistry of Solids
Volume	67
Issue number	9-10
DOIs	https://doi.org/10.1016/j.jpcs.2006.05.014
Publication status	Published - Sept 2006

Keywords

A. Superconductors
C. High pressure
D. Superconductivity

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.jpcs.2006.05.014

Cite this

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title = "Signature of pressure-induced phase separation in Ce1-xLaxRu2 system",

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.",

keywords = "A. Superconductors, C. High pressure, D. Superconductivity",

author = "F. Ono and Sun, {N. Q.} and Y. Matsushima and Saini, {N. L.}",

note = "Funding Information: The authors would like to thank A. Bianconi and A. Marcelli for useful discussion on the subject. This work has been partially supported by the EU project entitled “CoMePhs” under the contract no. 517039. ",

year = "2006",

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language = "English",

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AU - Ono, F.

AU - Sun, N. Q.

AU - Matsushima, Y.

AU - Saini, N. L.

N1 - Funding Information: The authors would like to thank A. Bianconi and A. Marcelli for useful discussion on the subject. This work has been partially supported by the EU project entitled “CoMePhs” under the contract no. 517039.

PY - 2006/9

Y1 - 2006/9

N2 - 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.

AB - 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.

KW - A. Superconductors

KW - C. High pressure

KW - D. Superconductivity

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