The spin chirality induced anomalous Hall effect in pyrochlore ferromagnets

Y. Taguchi, Y. Oohara, H. Yoshizawa, N. Nagaosa, T. Sasaki, S. Awaji, Y. Iwasa, T. Tayama, T. Sakakibara, S. Iguchi, K. Ohgushi, T. Ito, Y. Tokura

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8 Citations (Scopus)


Temperature and magnetic field dependences of the anomalous Hall effect have been investigated for single crystals of Mo-based ferromagnets with pyrochlore structure. The Hall resistivity of Nd2Mo2O7 compound shows unconventional temperature dependence whereas Gd2Mo2O7 exhibits rather normal behaviour. The Berry phase model can explain the difference well; it is attributed to the difference in nature of the anisotropy of the rare-earth moment and the resultant Mo spin state. The Hall resistivity of Nd2Mo2O7 changes its sign with increasing field applied along the [111] direction, while it monotonically approaches zero with the field applied along the [100] or [110] direction. This behaviour is also in accord with the prediction of the Berry phase theory.

Original languageEnglish
Pages (from-to)S599-S606
JournalJournal of Physics Condensed Matter
Issue number11 SPEC. ISS.
Publication statusPublished - 2004 Mar 24

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics


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