Two distinct ferroelectric phases in the multiferroic y -type hexaferrite Ba2 Mg2 Fe12 O22

Hajime Sagayama, Kouji Taniguchi, Nobuyuki Abe, Taka Hisa Arima, Yusaku Nishikawa, Shin Ichiro Yano, Yusuke Kousaka, Jun Akimitsu, Masato Matsuura, Kazuma Hirota

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44 Citations (Scopus)

Abstract

The magnetic phase diagram of the Y -type hexaferrite Ba2 Mg2 Fe12 O22 has been studied using single-crystal neutron diffraction. The result indicates successive phase transitions where the magnetic modulation wave number changed discontinuously when a magnetic field is applied and the temperature is varied. For the low-temperature spin-driven ferroelectric state, we have found a sixfold structure with q= (001/2) in weak magnetic fields and a twofold structure with q= (003/2) in strong magnetic fields between which a first-order transition intervenes accompanied by a hysteresis.

Original languageEnglish
Article number180419
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number18
DOIs
Publication statusPublished - Nov 20 2009
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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