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Quantum Critical Point in the Itinerant Ferromagnet Ni_{1-x}Rh_{x}.
Huang, C-L; Hallas, A M; Grube, K; Kuntz, S; Spieß, B; Bayliff, K; Besara, T; Siegrist, T; Cai, Y; Beare, J; Luke, G M; Morosan, E.
Affiliation
  • Huang CL; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA.
  • Hallas AM; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA.
  • Grube K; Department of Physics and Astronomy and Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
  • Kuntz S; Institute for Quantum Materials and Technologies, 76021 Karlsruhe, Germany.
  • Spieß B; Institute for Quantum Materials and Technologies, 76021 Karlsruhe, Germany.
  • Bayliff K; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA.
  • Besara T; Department of Chemistry, Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.
  • Siegrist T; Department of Chemistry, Rice University, Houston, Texas 77005, USA.
  • Cai Y; National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA.
  • Beare J; Department of Physics, Astronomy, and Materials Science, Missouri State University, Springfield, Missouri 65897, USA.
  • Luke GM; National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA.
  • Morosan E; FAMU-FSU College of Engineering, Tallahassee, Florida 32310, USA.
Phys Rev Lett ; 124(11): 117203, 2020 Mar 20.
Article in En | MEDLINE | ID: mdl-32242686
ABSTRACT
We report a chemical substitution-induced ferromagnetic quantum critical point in polycrystalline Ni_{1-x}Rh_{x} alloys. Through magnetization and muon spin relaxation measurements, we show that the ferromagnetic ordering temperature is suppressed continuously to zero at x_{crit}=0.375 while the magnetic volume fraction remains 100% up to x_{crit}, pointing to a second order transition. Non-Fermi liquid behavior is observed close to x_{crit}, where the electronic specific heat C_{el}/T diverges logarithmically, while immediately above x_{crit} the volume thermal expansion coefficient α_{V}/T and the Grüneisen ratio Γ=α_{V}/C_{el} both diverge logarithmically in the low temperature limit, further indication of a ferromagnetic quantum critical point in Ni_{1-x}Rh_{x}.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2020 Document type: Article
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2020 Document type: Article