Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-03-31
Physics
Condensed Matter
Statistical Mechanics
4 pages, 5 figures, in RevTex4, submitted to J. Phys. Soc. Jpn
Scientific paper
10.1143/JPSJ.73.1619
We find that the true ground state of the dipolar spin ice system under [110]-magnetic fields is the ``Q=X'' structure, which is consistent with both experiments and Monte Carlo simulations. We then perform a Monte Carlo simulation to confirm that there exists a first order phase transition under the [110]-field. In particular this result indicates the existence of the first order phase transition to the ``Q=X'' phase in the field above 0.35 T for Dy2Ti2O7. We also show the magnetic field-temperature phase diagram to summarize the ordered states of this system.
Nemoto Koji
Wada Koh
Yoshida Shun-ichi
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