Field-induced incommensurate-to-commensurate phase transition in the magnetoelectric hexaferrite Ba0.5Sr1.5Zn 2(Fe1-xAlx)12O22

Hak Bong Lee; Young Sang Song; Jae Ho Chung; Sae Hwan Chun; Yi Sheng Chai; Kee Hoon Kim; M. Reehuis; K. Proke; S. Mat'A

doi:10.1103/PhysRevB.83.144425

Field-induced incommensurate-to-commensurate phase transition in the magnetoelectric hexaferrite Ba_0.5Sr_1.5Zn ₂(Fe_1-xAl_x)₁₂O₂₂

Hak Bong Lee, Young Sang Song, Jae Ho Chung, Sae Hwan Chun, Yi Sheng Chai, Kee Hoon Kim, M. Reehuis, K. Proke, S. Mat'A

Department of Physics

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60 Citations (Scopus)

Abstract

Using neutron diffraction, we investigated the spin structures of magnetoelectric hexaferrite, Ba_0.5Sr_1.5Zn ₂(Fe_1-xAl_x)₁₂O₂₂ (x=0.08) under a magnetic field (Hc). When the crystal was cooled in a zero field, longitudinal spin cones were observed at low temperatures. These incommensurate phases, however, were replaced by the commensurate phase [k₁=(0,0,32) ] when the ferroelectricity was induced by an external field perpendicular to the c axis. Magnetic structure refinement confirms that this commensurate order is compatible with the spin-current polarization. We argue that planar magnetic anisotropy plays an important role in determining the magnetic structure that is responsible for its magnetoelectricity.

Original language	English
Article number	144425
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.83.144425
Publication status	Published - 2011 Apr 26

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.83.144425

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title = "Field-induced incommensurate-to-commensurate phase transition in the magnetoelectric hexaferrite Ba0.5Sr1.5Zn 2(Fe1-xAlx)12O22",

abstract = "Using neutron diffraction, we investigated the spin structures of magnetoelectric hexaferrite, Ba0.5Sr1.5Zn 2(Fe1-xAlx)12O22 (x=0.08) under a magnetic field (Hc). When the crystal was cooled in a zero field, longitudinal spin cones were observed at low temperatures. These incommensurate phases, however, were replaced by the commensurate phase [k1=(0,0,32) ] when the ferroelectricity was induced by an external field perpendicular to the c axis. Magnetic structure refinement confirms that this commensurate order is compatible with the spin-current polarization. We argue that planar magnetic anisotropy plays an important role in determining the magnetic structure that is responsible for its magnetoelectricity.",

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doi = "10.1103/PhysRevB.83.144425",

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T1 - Field-induced incommensurate-to-commensurate phase transition in the magnetoelectric hexaferrite Ba0.5Sr1.5Zn 2(Fe1-xAlx)12O22

AU - Lee, Hak Bong

AU - Song, Young Sang

AU - Chung, Jae Ho

AU - Chun, Sae Hwan

AU - Chai, Yi Sheng

AU - Kim, Kee Hoon

AU - Reehuis, M.

AU - Proke, K.

AU - Mat'A, S.

PY - 2011/4/26

Y1 - 2011/4/26

N2 - Using neutron diffraction, we investigated the spin structures of magnetoelectric hexaferrite, Ba0.5Sr1.5Zn 2(Fe1-xAlx)12O22 (x=0.08) under a magnetic field (Hc). When the crystal was cooled in a zero field, longitudinal spin cones were observed at low temperatures. These incommensurate phases, however, were replaced by the commensurate phase [k1=(0,0,32) ] when the ferroelectricity was induced by an external field perpendicular to the c axis. Magnetic structure refinement confirms that this commensurate order is compatible with the spin-current polarization. We argue that planar magnetic anisotropy plays an important role in determining the magnetic structure that is responsible for its magnetoelectricity.

AB - Using neutron diffraction, we investigated the spin structures of magnetoelectric hexaferrite, Ba0.5Sr1.5Zn 2(Fe1-xAlx)12O22 (x=0.08) under a magnetic field (Hc). When the crystal was cooled in a zero field, longitudinal spin cones were observed at low temperatures. These incommensurate phases, however, were replaced by the commensurate phase [k1=(0,0,32) ] when the ferroelectricity was induced by an external field perpendicular to the c axis. Magnetic structure refinement confirms that this commensurate order is compatible with the spin-current polarization. We argue that planar magnetic anisotropy plays an important role in determining the magnetic structure that is responsible for its magnetoelectricity.

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Field-induced incommensurate-to-commensurate phase transition in the magnetoelectric hexaferrite Ba_0.5Sr_1.5Zn ₂(Fe_1-xAl_x)₁₂O₂₂

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