Anomalous Hall resistivity and possible topological Hall effect in the EuAl4 antiferromagnet

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • T. Shang
  • Y. Xu
  • D. J. Gawryluk
  • T. Shiroka
  • M. Shi
  • E. Pomjakushina

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article numberL020405
Journal / PublicationPhysical Review B
Volume103
Issue number2
Online published11 Jan 2021
Publication statusPublished - Jan 2021

Abstract

We report the observation of anomalous Hall resistivity in single crystals of EuAl4, a centrosymmetric tetragonal compound, which exhibits coexisting antiferromagnetic (AFM) and charge-density-wave (CDW) orders with onset at TN∼15.6K and TCDW∼140K, respectively. In the AFM state, when the magnetic field is applied along the c-axis direction, EuAl4 undergoes a series of metamagnetic transitions. Within this field range, we observe a clear humplike anomaly in the Hall resistivity, representing part of the anomalous Hall resistivity. By considering different scenarios, we conclude that such a humplike feature is most likely a manifestation of the topological Hall effect, normally occurring in noncentrosymmetric materials known to host nontrivial topological spin textures. In view of this, EuAl4 would represent a rare case where the topological Hall effect not only arises in a centrosymmetric structure, but it also coexists with CDW order.

Citation Format(s)

Anomalous Hall resistivity and possible topological Hall effect in the EuAl4 antiferromagnet. / Shang, T.; Xu, Y.; Gawryluk, D. J.; Ma, J. Z.; Shiroka, T.; Shi, M.; Pomjakushina, E.

In: Physical Review B, Vol. 103, No. 2, L020405, 01.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review