Abstract
We report a study of isoelectronic chemical substitution in the recently discovered quantum critical ferromagnet . Upon silicon doping, the ferromagnetic ordering temperature of is continuously suppressed, and no transition is observed beyond . Non-Fermi-liquid behavior with ) is observed close to , indicating the existence of strong quantum fluctuations, while the -linear behavior observed upon pressurizing the parent compound is absent in the resistivity, which is likely a consequence of the disorder induced by silicon doping. Our findings show the effects of disorder on the unusual ferromagnetic quantum criticality in , and provide further evidence for understanding the origin of this behavior.
- Received 24 March 2022
- Revised 30 June 2022
- Accepted 25 July 2022
DOI:https://doi.org/10.1103/PhysRevB.106.054409
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