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RESEARCH PRODUCT
Alloying experiments on heavy fermion compounds
Christoph GeibelC. SchankAlois LoidlA. KrimmelG. SparnFrank SteglichU. AhlheimSiegfried HornMichael Langsubject
Materials scienceCondensed matter physicsMagnetismHeavy fermionIncoherent scatterQuasiparticleAntiferromagnetismCondensed Matter::Strongly Correlated ElectronsCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsCoherence (physics)description
Abstract This paper is intended to demonstrate the usefulness of controlled alloying for the understanding of heavy-fermion physics: (1) Th-substitution for Ce in CeCu2Si2 emphasizes the dominating role of the dopant-induced strain fields in generating incoherent scattering and pair breaking, (2) replacement of Cu by Ni in Ce(Cu1-xNix)2Ge2 leads to phenomena which are interpreted as derived from a transition between local-moment and itinerant heavy-fermion magnetism, and (3) increasing Cu concentration in UCu4+xAl8-x is accompanied by an antiferromagnetic to nonmagnetic transition near xcr = 1.5 similar to what has been found before for several Ce-based systems. A heavy Fermi-liquid phase with incipient coherence of the quasiparticles is established for x⪆xcr.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-03-01 |