Temperature-dependent properties of the magnetic order in single-crystal BiFeO 3

M. Ramazanoglu, W. Ratcliff, Y. J. Choi, Seongsu Lee, S. W. Cheong, V. Kiryukhin

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

We report neutron diffraction and magnetization studies of the magnetic order in multiferroic BiFeO 3. In ferroelectric monodomain single crystals, there are three magnetic cycloidal domains with propagation vectors equivalent by crystallographic symmetry. The cycloid period slowly grows with increasing temperature. The magnetic domain populations do not change with temperature except in the close vicinity of the Néel temperature, at which, in addition, a small jump in magnetization is observed. No evidence for the spin-reorientation transitions proposed in previous Raman and dielectric studies is found. The magnetic cycloid is slightly anharmonic for T=5 K. The anharmonicity is much smaller than previously reported in nuclear magnetic resonance studies. At room temperature, a circular cycloid is observed, within errors. We argue that the observed anharmonicity provides important clues for understanding electromagnons in BiFeO 3.

Original languageEnglish
Article number174434
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number17
DOIs
Publication statusPublished - 2011 May 23

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cycloids
Single crystals
magnetic domains
single crystals
Magnetization
magnetization
Temperature
Magnetic domains
retraining
temperature
neutron diffraction
Neutron diffraction
Ferroelectric materials
nuclear magnetic resonance
propagation
Nuclear magnetic resonance
symmetry
room temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Ramazanoglu, M. ; Ratcliff, W. ; Choi, Y. J. ; Lee, Seongsu ; Cheong, S. W. ; Kiryukhin, V. / Temperature-dependent properties of the magnetic order in single-crystal BiFeO 3 In: Physical Review B - Condensed Matter and Materials Physics. 2011 ; Vol. 83, No. 17.
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Temperature-dependent properties of the magnetic order in single-crystal BiFeO 3 . / Ramazanoglu, M.; Ratcliff, W.; Choi, Y. J.; Lee, Seongsu; Cheong, S. W.; Kiryukhin, V.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 83, No. 17, 174434, 23.05.2011.

Research output: Contribution to journalArticle

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AU - Ramazanoglu, M.

AU - Ratcliff, W.

AU - Choi, Y. J.

AU - Lee, Seongsu

AU - Cheong, S. W.

AU - Kiryukhin, V.

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N2 - We report neutron diffraction and magnetization studies of the magnetic order in multiferroic BiFeO 3. In ferroelectric monodomain single crystals, there are three magnetic cycloidal domains with propagation vectors equivalent by crystallographic symmetry. The cycloid period slowly grows with increasing temperature. The magnetic domain populations do not change with temperature except in the close vicinity of the Néel temperature, at which, in addition, a small jump in magnetization is observed. No evidence for the spin-reorientation transitions proposed in previous Raman and dielectric studies is found. The magnetic cycloid is slightly anharmonic for T=5 K. The anharmonicity is much smaller than previously reported in nuclear magnetic resonance studies. At room temperature, a circular cycloid is observed, within errors. We argue that the observed anharmonicity provides important clues for understanding electromagnons in BiFeO 3.

AB - We report neutron diffraction and magnetization studies of the magnetic order in multiferroic BiFeO 3. In ferroelectric monodomain single crystals, there are three magnetic cycloidal domains with propagation vectors equivalent by crystallographic symmetry. The cycloid period slowly grows with increasing temperature. The magnetic domain populations do not change with temperature except in the close vicinity of the Néel temperature, at which, in addition, a small jump in magnetization is observed. No evidence for the spin-reorientation transitions proposed in previous Raman and dielectric studies is found. The magnetic cycloid is slightly anharmonic for T=5 K. The anharmonicity is much smaller than previously reported in nuclear magnetic resonance studies. At room temperature, a circular cycloid is observed, within errors. We argue that the observed anharmonicity provides important clues for understanding electromagnons in BiFeO 3.

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