Ferromagnetic spin fluctuations in the kagome metal Sc<sub>3</sub>Mn<sub>3</sub>Al<sub>7</sub>Si<sub>5</sub> revealed by <sup>27</sup>Al nuclear magnetic resonance measurement

ORAL

Abstract

Sc3Mn3Al7Si5 (SMAS) with a hexagonal structure (space group P63/mmc) has been reported to be one of the rare metallic systems with Mn ions forming the kagome lattice. Magnetic susceptibility, specific heat, and neutron diffraction measurements show no long-range magnetic order down to 1.8 K. To investigate the magnetic and electronic states of SMAS from a microscopic point of view, we have carried out 27Al nuclear magnetic resonance (NMR) measurements in the temperature region between 1.5 K and 300 K. From our analysis using the NMR results of the temperature dependences of the NMR spectrum and the nuclear spin-lattice relaxation time T1, ferromagnetic spin fluctuations were found to develop with decreasing temperatures. This is consistent with the recent report of 27Al NMR measurements. In the talk, I will also report our new data of 55Mn NMR in addition to the 27Al NMR results and discuss the peculiar metallic state of the compound.

*This work was supported by startup funding from the University of Central Florida.The work at Ames National Laboratory was supported by the U.S. Department of Energy, Division of Materials Sciences and Engineering. Ames National Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No. DE-AC02-07CH11358.

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Presenters

  • Charles Taylor

    • Iowa State University

Authors

  • Charles Taylor

    • Iowa State University

  • Qing-Ping Ding

    • Ames National Laboratory

  • Charuni Dissanayake

    • National High Magnetic Field Laboratory, Florida State University
    • University of Central Florida

  • Yongbin Lee

    • Iowa State University

  • Yasuyuki Nakajima

    • University of Central Florida

  • Yuji Furukawa

    • Iowa State University
    • Ames National Laboratory, and Department of Physics and Astronomy, Iowa State University
    • Ames National Laboratory, Iowa State University