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 language | English |
|---|---|
| Article number | 174434 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 83 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - 2011 May 23 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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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 journal › Article
TY - JOUR
T1 - Temperature-dependent properties of the magnetic order in single-crystal BiFeO 3
AU - Ramazanoglu, M.
AU - Ratcliff, W.
AU - Choi, Y. J.
AU - Lee, Seongsu
AU - Cheong, S. W.
AU - Kiryukhin, V.
PY - 2011/5/23
Y1 - 2011/5/23
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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U2 - 10.1103/PhysRevB.83.174434
DO - 10.1103/PhysRevB.83.174434
M3 - Article
AN - SCOPUS:79961147369
VL - 83
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 17
M1 - 174434
ER -