Anomalous pressure effect on the magnetic ordering in multiferroic BiMnO3

C. C. Chou, S. Taran, J. L. Her, C. P. Sun, C. L. Huang, H. Sakurai, A. A. Belik, E. Takayama-Muromachi, H. D. Yang

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18 Citations (Scopus)

Abstract

We report the magnetic-field-dependent dc magnetization and the pressure-dependent (pmax ∼16 kbar) ac susceptibilities χp (T) on both powder and bulk multiferroic BiMnO3 samples, synthesized in different batches under high pressure. A clear ferromagnetic (FM) transition is observed at TC ∼100 K, and increases with magnetic field. The magnetic hysteresis behavior is similar to that of a soft ferromagnet. Ac susceptibility data indicate that both the FM peak and its temperature (TC) decrease simultaneously with increasing pressure. Interestingly, above a certain pressure (9-11 kbar), another peak appears at Tp ∼93 K, which also decreases with increasing pressure, with both these peaks persisting over some intermediate pressure range (9-13 kbar). The FM peak disappears with further application of pressure; however, the second peak survives until present pressure limit (pmax ∼16 kbar). These features are considered to originate from the complex interplay of the magnetic and orbital structure of BiMnO3 being affected by pressure.

Original languageEnglish
Article number092404
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number9
DOIs
Publication statusPublished - 2008 Sep 11

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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