We report a chemical substitution-induced ferromagnetic quantum critical point in polycrystalline Ni1−xRhx alloys. Through magnetization and muon spin relaxation measurements, we show that the ferromagnetic ordering temperature is suppressed continuously to zero at xcrit=0.375 while the magnetic volume fraction remains 100% up to xcrit, pointing to a second order transition. Non-Fermi liquid behavior is observed close to xcrit, where the electronic specific heat Cel/T diverges logarithmically, while immediately above xcrit the volume thermal expansion coefficient αV/T and the Gr\"uneisen ratio Γ=αV/Cel both diverge logarithmically in the low temperature limit, further indication of a ferromagnetic quantum critical point in Ni1−xRhx.
@article{arxiv.2001.05533,
title = {Quantum critical point in the itinerant ferromagnet Ni$_{1-x}$Rh$_x$},
author = {C. -L. Huang and A. M. Hallas and K. Grube and S. Kuntz and B. Spiess and K. Bayliff and T. Besara and T. Siegrist and Y. Cai and J. Beare and G. M. Luke and E. Morosan},
journal= {arXiv preprint arXiv:2001.05533},
year = {2020}
}