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- W2077978096 abstract "In order to study the single-site and inter-site effects in CeRu 2 Si 2 , a systematic diluting experiment has been performed with the single crystals of pseudo-ternary alloys Ce 1- x (La 0.63 Y 0.37 ) x Ru 2 Si 2 [0≤ x ≤1], where the unit cell volume is kept unchanged to avoid the chemical pressure effect. Magnetization process in fields H ≤200 kOe and at applied pressures P ≤5 kbar, specific heat C ( T ), electrical resistivity ρ( T ) and thermal expansion have been measured at temperatures above 1.5 K, with a special attention being paid to the metamagnetic behavior inherent in CeRu 2 Si 2 . In a whole Ce concentration range, the system remains in a non-magnetic state. Sharp metamagnetism shows a rapid broadening with x , and disappears at x ∼0.2 where incoherent Kondo scattering becomes significant in ρ( T ). By careful analysis of single-site contributions, a peak structure is revealed in C ( T ) which is not explained by the “Kondo peak” alone. The result can be interpreted by a pseudo-gap in the quasi-particle band, which disappears upon dilution. Constant-volume magnetization process M V ( H ) is derived from the measured zero-pressure curves, using the scaling hypothesis proved by the high-pressure experiment. Metamagnetism, although becoming much less sharp, still exists in M V ( H ), indicating importance of an intrinsic mechanism other than the volume effect." @default.
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- W2077978096 date "1997-09-15" @default.
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- W2077978096 title "Single-Site and Inter-Site Effects in Heavy Fermion Compound CeRu<sub><b>2</b></sub>Si<sub><b>2</b></sub>Studied by Constant Volume Dilution" @default.
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- W2077978096 doi "https://doi.org/10.1143/jpsj.66.2851" @default.
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