Small Moment, Itinerant Ferromagnetism Discovered in Single Crystalline La<sub>5</sub>Co<sub>2</sub>Ge<sub>3</sub>

ORAL

Abstract

Single crystals of monoclinic La5Co2Ge3 were grown using a self-flux method and were characterized by room-temperature powder X-ray diffraction, anisotropic temperature and field dependent magnetization, temperature dependent resistivity, specific heat, and muon spin resonance. La5Co2Ge3 has a Curie temperature (TC) of ∼3.8 K, as well as a clear loss of spin disorder scattering in resistivity data and a sharp specific heat anomaly. The magnetism associated with La5Co2Ge3 has μeff = 0.92 μB per mol-Co, μsat = 0.11 μB per mol-Co, and a change in the entropy at TC of ∼0.05 R ln2 per mol-Co making it a rare, itinerant, low TC compound.

*This work is supported by the US DOE, Basic Energy Sciences under Contract No. DE-AC02-07CH11358, the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4411, and the W.M. Keck Foundation.

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Presenters

  • Scott Saunders

    • Iowa State University

Authors

  • Scott Saunders

    • Iowa State University

  • Li Xiang

    • Ames Laboratory and Iowa State University
    • Iowa State University, Ames Laboratory
    • Iowa State University

  • Rustem Khasanov

    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, Switzerland
    • Paul Scherrer Institut

  • Tai Kong

    • Chemistry, Pinceton University
    • Princeton University

  • Qisheng Lin

    • Iowa State University

  • 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