Low-temperature dielectric anomalies in HoMn O3: The complex phase diagram

F. Yen, C. R. Dela Cruz, B. Lorenz, Y. Y. Sun, Y. Q. Wang, M. M. Gospodinov, C. W. Chu

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)


The dielectric constant of multiferroic hexagonal HoMn O3 exhibits an unprecedented diversity of anomalies at low temperatures (1.8 K<T<10 K) and under external magnetic fields related to magnetic phase transitions in the coupled system of Ho moments, Mn spins, and ferroelectric polarization. The derived phase diagram is far more complex than previously assumed including reentrant phases, phase transitions with distinct thermal and field hysteresis, as well as several multicritical points. Magnetoelastic interactions introduce lattice anomalies at the magnetic phase transitions. The reevaluation of the T-H phase diagram of HoMn O3 is demanded.

Original languageEnglish
Article number180407
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number18
Publication statusPublished - 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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