Ordered Phase of Dipolar Spin Ice under [110] Magnetic Field

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  • Yoshida Shun-ichi
    Division of Physics, Graduate School of Science, Hokkaido University
  • Nemoto Koji
    Division of Physics, Graduate School of Science, Hokkaido University
  • Wada Koh
    Division of Physics, Graduate School of Science, Hokkaido University

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We found that the true ground state of a dipolar spin ice system under a [110] magnetic field is a “Q=X” structure, which is consistent with both experiments and Monte Carlo simulations. We performed a Monte Carlo simulation to confirm the existence of a first-order phase transition under a [110] magnetic field. The result indicates the existence of the first-order phase transition to the “Q=X” phase in a magnetic field above 0.35 T for Dy2Ti2O7. In this letter we show a magnetic field-temperature phase diagram to summarize the ordered states of this system.

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