TY - JOUR
T1 - Magnetic-field control of electric polarization in a helimagnetic haxaferrite Ba2Mg2Fe12O22
AU - Ishiwata, S.
AU - Taguchi, Y.
AU - Murakawa, H.
AU - Onose, Y.
AU - Tokura, Y.
PY - 2009
Y1 - 2009
N2 - A Y-type hexaferrite Ba2Mg2Fe12O 22 undergoes a transition to a proper-screw type helimagnetic structure with a propagation vector k0 [001] at 195 K, below which the system shows field-induced successive transitions under magnetic fields up to 1 T. Magnetization measurements also indicate the presence of the conical spin structure at low magnetic fields (∼ 10 mT) below about 50 K. We report on the magnetic control of the electric polarization in Ba2Mg 2Fe12O22 with using the linearly oscillating fields up to 1 T at 5 K. The polarization vector can be cyclically reversed by weak magnetic fields of 30 mT. In addition, the polarization vector is repeatedly reversed without significant decay even by applying fields of ± 1 T, which suggests that the sense of the spin helix is somehow conserved in the process of the field-induced phase transitions. We propose that the conical spin structure carries the polarization vector upon the reversal of magnetic field.
AB - A Y-type hexaferrite Ba2Mg2Fe12O 22 undergoes a transition to a proper-screw type helimagnetic structure with a propagation vector k0 [001] at 195 K, below which the system shows field-induced successive transitions under magnetic fields up to 1 T. Magnetization measurements also indicate the presence of the conical spin structure at low magnetic fields (∼ 10 mT) below about 50 K. We report on the magnetic control of the electric polarization in Ba2Mg 2Fe12O22 with using the linearly oscillating fields up to 1 T at 5 K. The polarization vector can be cyclically reversed by weak magnetic fields of 30 mT. In addition, the polarization vector is repeatedly reversed without significant decay even by applying fields of ± 1 T, which suggests that the sense of the spin helix is somehow conserved in the process of the field-induced phase transitions. We propose that the conical spin structure carries the polarization vector upon the reversal of magnetic field.
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U2 - 10.1088/1742-6596/150/4/042073
DO - 10.1088/1742-6596/150/4/042073
M3 - Article
AN - SCOPUS:77952512795
VL - 150
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 4
M1 - 042073
ER -