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Pressure Evolution of the Magnetic Field induced Ferromagnetic Fluctuation through the Pseudo-Metamagnetism of CeRu2Si2

Resistivity measurements performed under pressure in the paramagnetic ground state of CeRu2Si2 are reported. They demonstrate that the relative change of effective mass through the pseudo metamagnetic transition is invariant under pressure. The results are compared with the first order metamagnetic transition due to the antiferromagnetism of Ce0.9La0.1Ru2Si2 which corresponds to the "negative" pressure of CeRu2Si2 by volume expansion. Finally, we describe the link between the spin-depairing of quasiparticles on CeRu2Si2 and that of Cooper pairs on the unconventional heavy fermion superconductor CeCoIn5.

preprint2011arXivOpen access
Dai AokiCarley PaulsenTatsuma D. MatsudaLiam MaloneGeorg KnebelPierre HaenPascal LejayRikio SettaiYoshichika OnukiJacques Flouquet
cond-mat.str-el
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Dai AokiCarley PaulsenTatsuma D. MatsudaLiam MaloneGeorg KnebelPierre HaenPascal LejayRikio SettaiYoshichika OnukiJacques Flouquet

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