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 引文 斯高帕斯(Scopus)


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.

期刊Physical Review B - Condensed Matter and Materials Physics
出版狀態Published - 2008 9月 11

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學


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