Ferromagnetic van der Waals compound MnSb<sub>1.8</sub>Bi<sub>0.2</sub>Te<sub>4</sub>

ORAL

Abstract

The coexistence of topology and magnetism in the same material offers the possibility to realize novel quantum phenomena such as the quantum anomalous Hall effect. Van der Waals magnetic compounds in the form of MnSbxBi2-xTe4 are promising candidates. In this work, we show that a Sb-rich composition MnSb1.8Bi0.2Te4 exhibits a ferromagnetic ground state below a Curie temperature of 26 K, in contrast to antiferromagnetic states found in previous studies of this compound family. Magneto-transport measurements are performed on flakes that are ~ 100 nm thick and prepared in an argon atmosphere. At low temperature, pronounced hysteresis is observed in magnetic field sweeps of Rxy and Rxx. A remnant magnetization of M0 = 0.6 μB/Mn, is extracted from bulk magnetization measurements. The presence of a major ferromagnetic phase is further confirmed by neutron diffraction studies. An excess signal beyond the conventional anomalous Hall effect is observed at T < 12 K. We discuss the implications of our results.

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Presenters

  • Ya-Wen Chuang

    • Physics, The Pennsylvania State University
    • Pennsylvania State University

Authors

  • Yangyang Chen

    • Physics, The Pennsylvania State University
    • Pennsylvania State University
    • Department of physics, ICQM, Peking University

  • Ya-Wen Chuang

    • Physics, The Pennsylvania State University
    • Pennsylvania State University

  • Seng Huat Lee

    • 2D Crystal Consortium, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA
    • Physics, The Pennsylvania State University
    • Pennsylvania State University
    • MRI, Penn State University

  • Yanglin Zhu

    • Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA
    • Physics, The Pennsylvania State University
    • Department of Physics, Pennsylvania State University
    • Pennsylvania State University
    • Penn State University
    • Physics, Penn State University
    • Pennsylvania state University

  • Kevin Honz

    • Physics, The Pennsylvania State University
    • Pennsylvania State University

  • Yingdong Guan

    • Physics, The Pennsylvania State University
    • Pennsylvania State University

  • Yu Wang

    • Physics, Pennsylvania State University
    • Physics, The Pennsylvania State University
    • Pennsylvania State University
    • Department of Physics, Pennsylvania State University
    • Physics, Penn State University
    • Pennsylvania state University

  • Ke Wang

    • Materials Research Institute, The Pennsylvania State University
    • Pennsylvania State University
    • Materials Research Institute, Pennsylvania State University

  • Zhiqiang Mao

    • Pennsylvania State University
    • Tulane University
    • Physics, Pennsylvania State University
    • Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA
    • Physics, The Pennsylvania State University
    • Department of Physics, Pennsylvania State University
    • Penn State University
    • Physics, Penn State University
    • The Pennsylvania State University

  • Colin Heikes

    • National Institute of Standards and Technology

  • Patrick Quarterman

    • National Institute of Standards and Technology

  • Pawel Zajdel

    • Institute of Physics, University of Silesia
    • University of Silesia

  • Julie Ann Borchers

    • National Institute of Standards and Technology Center for Neutron Research
    • National Institute of Standards and Technology
    • NIST Center for Neutron Research, National Institute of Standards and Technology

  • William Ratcliff

    • National Institute of Standards and Technology

  • Jun Zhu

    • Pennsylvania State University
    • Physics, The Pennsylvania State University