Study on Anomalous Hall Resistivity of Nd2Mo2-xTixO7.

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  • Kageyama Taketomo
    Department of Physics, Division of Material Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602
  • Iikubo Satoshi
    Department of Physics, Division of Material Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602
  • Yoshii Shunsuke
    CREST, Japan Science and Technology Corporation (JST)
  • Kondo Yasuyuki
    Department of Physics, Division of Material Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602
  • Sato Masatoshi
    Department of Physics, Division of Material Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602 CREST, Japan Science and Technology Corporation (JST)
  • Iye Yasuhiro
    CREST, Japan Science and Technology Corporation (JST) The Institute for Solid State Physics, The University of Tokyo, Kashiwa 277-8581

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  • Study on Anomalous Hall Resistivity of Nd<sub>2</sub>Mo<sub>2-<i>x</i></sub>Ti<sub><i>x</i></sub>O<sub>7</sub>

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Hall resistivity ρH has been studied for single crystals of Nd2Mo2O7, which has the ferromagnetic and chiral ordered state. Effects of Ti-doping on ρH have also been studied down to 3 K under the magnetic field (H) up to 7 T. The T- and H-regions of the measurements have been extended for non-doped samples to 50 mK and 15 T, respectively. From the results, it has been confirmed that two components of the anomalous Hall resistivity exist. One is proportional to the net magnetization of Mo atoms, MMo. It changes its sign with the doping. The other is proportional to the net magnetization of Nd atoms, MNd and does not exhibit the sign change. The Hall resistivity has a finite and almost T-independent value at very low temperatures. These results on the behavior of ρH are discussed by considering the existing theories including the one recently proposed by a mechanism related to the spin chiral order.

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