Magnetic fluctuations in the itinerant ferromagnet LaCrGe3 studied by 139La NMR

ORAL

Abstract

Recently much attention has been paid to itinerant ferromagnetic (FM) compounds because of the observations of unconventional superconductivity (SC) as well as the avoidance of FM quantum critical point (QCP) under application of pressure (p) and magnetic field (H). In this context, the itinerant ferromagnet LaCrGe3 (Curie temperature of TC=85 K) is very unique. It exhibits an avoided FM QCP under pressure through both a modulated antiferromagnetic phase as well as tricritical wing structure in its temperature-pressure-magnetic field (T−p−H) phase diagram. In order to characterize the static and dynamical magnetic properties of this peculiar material, we carried out 139La nuclear magnetic resonance (NMR) measurements. Here we present our analysis of the NMR data using self-consistent-renormalization theory and provide a comparison of this system in the generalized Rhodes-Wohlfarth plot with other similar itinerant ferromagnets.

*This work was supported by the USDOE, Basic Energy Sciences, Division of Materials Sciences and Engineering, under Contract No. DE-AC02-07CH11358. Part of the work was supported by the Japan Society for the Promotion of Science KAKENHI GrantNumbers JP15H05882, JP15H05885, JP15K21732, and JP18H04321 (J-Physics).

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Presenters

  • Khusboo Rana

    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University

Authors

  • Khusboo Rana

    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University

  • Hisashi Kotegawa

    • Graduate School of Science, Kobe University

  • Rahim R. Ullah

    • Department of Physics, University of California Davis

  • Jeffrey S. Harvey

    • Department of Physics, University of California Davis

  • Sergey L. Bud'ko

    • Iowa State University
    • Ames Laboratory and Iowa State University
    • Ames Lab
    • Ames laboratory, Ames, IA
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University, Ames Laboratory
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University
    • Iowa State University/Ames Laboratory

  • Paul C Canfield

    • Iowa State University
    • Ames Laboratory and Iowa State University
    • Ames Lab
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames laboratory, Ames, IA
    • Ames Laboratory, Iowa State University
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University, Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University
    • Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy
    • Iowa State University/Ames Laboratory

  • Hideki Tou

    • Graduate School of Science, Kobe University

  • Valentin Taufour

    • University of California, Davis
    • Department of Physics, University of California Davis

  • Yuji Furukawa

    • Ames Laboratory and Dept. of Phys. and Astro., Iowa State University
    • Iowa State University
    • Iowa State University, Ames Laboratory
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University