Ce-Site Dilution in the Ferromagnetic Kondo Lattice CeRh6Ge4
- 1 September 2021
- journal article
- research article
- Published by IOP Publishing in Chinese Physics Letters
Abstract
The heavy fermion ferromagnet CeRh6Ge4 is the first example of a clean stoichiometric system where the ferromagnetic transition can be continuously suppressed by hydrostatic pressure to a quantum critical point. In order to reveal the outcome when the magnetic lattice of CeRh6Ge4 is diluted with non-magnetic atoms, this study reports comprehensive measurements of the physical properties of both single crystal and polycrystalline samples of La x Ce1–x Rh6Ge4. With increasing x, the Curie temperature decreases, and no transition is observed for x > 0.25, while the system evolves from exhibiting coherent Kondo lattice behaviors at low x to the Kondo impurity scenario at large x. Moreover, non-Fermi liquid behavior is observed over a wide doping range, which agrees well with the disordered Kondo model for 0.52 ≤ x ≤ 0.66, while strange metal behavior is revealed in the vicinity of x c = 0.26.Keywords
This publication has 25 references indexed in Scilit:
- Bismuth Flux Growth of CeRh6Ge4 and CeRh2Ge2 Single CrystalsZeitschrift für Naturforschung B, 2012
- Holes in a Kondo latticeProceedings of the National Academy of Sciences of the United States of America, 2011
- Lack of magnetic ordering in Ce1−x La x Ni2 Ge2Physica Status Solidi (b), 2010
- Quantum criticality in heavy-fermion metalsNature Physics, 2008
- Ce-site dilution studies in the antiferromagnetic heavy fermionsPhysical Review B, 2002
- Evidence for a Common Physical Description of Non-Fermi-Liquid Behavior in Chemically Substituted-Electron SystemsPhysical Review Letters, 1998
- Kondo disorder: a possible route towards non-Fermi-liquid behaviourJournal of Physics: Condensed Matter, 1996
- Kondo hole behavior inPhysical Review B, 1996
- Transport properties of the Anderson latticeZeitschrift für Physik B Condensed Matter, 1988
- Specific Heat of the Kondo ModelPhysical Review Letters, 1981