Exchange biased anomalous Hall effect driven by frustration in a magnetic kagome lattice

Ella Lachman; Ryan A Murphy; Nikola Maksimovic; Robert Kealhofer; Shannon Haley; Ross D McDonald; Jeffrey R Long; James G Analytis

doi:10.1038/s41467-020-14326-9

Exchange biased anomalous Hall effect driven by frustration in a magnetic kagome lattice

Nat Commun. 2020 Jan 28;11(1):560. doi: 10.1038/s41467-020-14326-9.

Authors

Ella Lachman^{1

2}, Ryan A Murphy³, Nikola Maksimovic^{4

5}, Robert Kealhofer^{4

5}, Shannon Haley^{4

5}, Ross D McDonald⁶, Jeffrey R Long^{5

3

7}, James G Analytis^{4

5}

Affiliations

¹ Department of Physics, University of California, Berkeley, CA, 94720, USA. ellal@berkeley.edu.
² Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA. ellal@berkeley.edu.
³ Department of Chemistry, University of California, Berkeley, CA, 94720, USA.
⁴ Department of Physics, University of California, Berkeley, CA, 94720, USA.
⁵ Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
⁶ Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
⁷ Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, 94720, USA.

Abstract

Co[Formula: see text]Sn[Formula: see text]S[Formula: see text] is a ferromagnetic Weyl semimetal that has been the subject of intense scientific interest due to its large anomalous Hall effect. We show that the coupling of this material's topological properties to its magnetic texture leads to a strongly exchange biased anomalous Hall effect. We argue that this is likely caused by the coexistence of ferromagnetism and geometric frustration intrinsic to the kagome network of magnetic ions, giving rise to spin-glass behavior and an exchange bias.

Abstract

Grants and funding