Flux Flow Transport Properties and Peak Effect in a CeRu2Single Crystal

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Abstract
We have measured the electrical resistivity and Hall resistivity in the flux flow state to investigate the superconducting mixed state properties in a CeRu 2 single crystal. We found that the peak effect, discussed in relation to the Fulde-Ferrel-Larkin-Ovchinnikov (FLLO) phases, persists up to a higher temperature than that reported previously based on magnetization and elastic measurements, which contradicts with the original FFLO theories. We have estimated the pinning force density from the dependence of the flux flow transport properties on the current density. We also report the normal state transport properties and the magnetization and compare them with those given in a recent report in which possible multiple phase superconductivity was proposed.

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