Title

Quantum Critical Point in the Itinerant Ferromagnet Ni1-xRhx

Abstract

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 ¼ 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 Grüneisen ratio Γ ¼ αV=Cel both diverge logarithmically in the low temperature limit, further indication of a ferromagnetic quantum critical point in Ni1−xRhx.

Department(s)

Physics, Astronomy, and Materials Science

Document Type

Article

DOI

https://doi.org/10.1103/PhysRevLett.124.117203

Publication Date

3-19-2020

Journal Title

Physical review letters

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