TY - JOUR
T1 - Quantum Critical Point in the Itinerant Ferromagnet Ni1-xRhx
AU - Huang, C. L.
AU - Hallas, A. M.
AU - Grube, K.
AU - Kuntz, S.
AU - Spieß, B.
AU - Bayliff, K.
AU - Besara, T.
AU - Siegrist, T.
AU - Cai, Y.
AU - Beare, J.
AU - Luke, G. M.
AU - Morosan, E.
N1 - Publisher Copyright:
© 2020 American Physical Society.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/3/20
Y1 - 2020/3/20
N2 - 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 Grüneisen ratio Γ=αV/Cel both diverge logarithmically in the low temperature limit, further indication of a ferromagnetic quantum critical point in Ni1-xRhx.
AB - 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 Grüneisen ratio Γ=αV/Cel both diverge logarithmically in the low temperature limit, further indication of a ferromagnetic quantum critical point in Ni1-xRhx.
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U2 - 10.1103/PhysRevLett.124.117203
DO - 10.1103/PhysRevLett.124.117203
M3 - Article
C2 - 32242686
AN - SCOPUS:85083042348
VL - 124
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 11
M1 - 117203
ER -