Abstract
We report a chemical substitution-induced ferromagnetic quantum critical point in polycrystalline alloys. Through magnetization and muon spin relaxation measurements, we show that the ferromagnetic ordering temperature is suppressed continuously to zero at while the magnetic volume fraction remains 100% up to , pointing to a second order transition. Non-Fermi liquid behavior is observed close to , where the electronic specific heat diverges logarithmically, while immediately above the volume thermal expansion coefficient and the Grüneisen ratio both diverge logarithmically in the low temperature limit, further indication of a ferromagnetic quantum critical point in .
- Received 15 January 2020
- Accepted 26 February 2020
DOI:https://doi.org/10.1103/PhysRevLett.124.117203
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