Heliconical magnetic order and field-induced multiferroicity of the Co 2Y-type hexaferrite Ba 0.3Sr 1.7Co 2Fe 12O 22

Hak Bong Lee, Sae Hwan Chun, Kwang Woo Shin, Byung Gu Jeon, Yi Sheng Chai, Kee Hoon Kim, Jürg Schefer, Hun Chang, Sae Na Yun, Tae Young Joung, Jae Ho Chung

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Abstract

Using magnetoelectric measurements and neutron diffraction, we investigated multiferroic properties of Co 2Y hexaferrite Ba 0.3Sr 1.7Co 2Fe 12O 22 in zero and finite magnetic field (H⊥c). Upon zero-field cooling, a longitudinal heliconical magnetic structure was observed below 280 K, which involves incommensurate planar helical ordering. When the magnetic field was applied perpendicular to its c axis, electric polarization was observed and the incommensurate ordering was replaced by a commensurate one as commonly observed in other hexaferrites. Electric polarization remained at its maximum during field reversal at 10 K, which indicates that magnetic anisotropy within the basal planes stabilizes the field-induced electric polarization.

Original languageEnglish
Article number094435
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number9
DOIs
Publication statusPublished - 2012 Sep 27

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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