Magneto-Optical Kerr Effect microscopy on the intercalated transition metal dichalcogenides FexTaS2

ORAL

Abstract

The layered transition metal dichalcogenide TaS2 exhibits a broad range of phases including CDW states and superconductivity [1]; the polymorph 1T-TaS2 has even been predicted to host a spin liquid [2]. Also of interest is the doping of such materials with metallic ions. In TaS2 the intercalation of Iron between layers stabilizes ferromagnetic order. The magnetic properties vary drastically with the amount of intercalant, x [3]. For example, for x=0.33 chiral superlattice structures form [4]. Here we employ scanning Magneto-Optical Kerr Effect (MOKE) microscopy to image the onset of magnetic order and in some instances optical birefringence in compounds with intercalation from x=0.26 to 0.33. In the x=0.33 compound we report a sharp structural phase transition coincident with the magnetic transition and image the resulting domains on a 10-μm scale.

[1] J.A. Wilson & A.D. Yoffe, Advances in Physics 18:73, 193-335, (1969)
[2] K. T. Law, Patrick A. Lee, PNAS 114 (27) 6996-7000; (2017)
[3] M. Eibshutz et al., Journal of Applied Physics 52, 2098 (1981)
[4] Y. Horibe et al., Color Theorems, Journal of the American Chemical Society (2014)

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Presenters

  • Arielle Little

    University of California, Berkeley

Authors

  • Arielle Little

    University of California, Berkeley

  • Dylan Rees

    University of California, Berkeley, Department of Physics, University of California, Berkeley

  • Spencer Doyle

    University of California, Berkeley, Physics, University of California, Berkeley

  • Caolan John

    University of California, Berkeley, Physics, University of California, Berkeley

  • Eran Maniv

    University of California, Berkeley, Physics, University of California, Berkeley

  • James G. Analytis

    Physics, University of California, Berkeley, University of California, Berkeley, Department of Physics, University of California, Berkeley, Department of Physics, University of California, Berkeley, California, University of California Berkeley

  • Joseph Orenstein

    University of California, Berkeley, Department of Physics, University of California, Berkeley