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O
(
= Ho, Er)Wakimoto, Shuichi; Kimura, Hiroyuki*; Fukunaga, Mamoru*; Nishihata, Keisuke*; Takeda, Masayasu; Kakurai, Kazuhisa; Noda, Yukio*; Tokura, Yoshinori*
Physica B; Condensed Matter, 404(17), p.2513 - 2516, 2009/09
Times Cited Count：5 Percentile：25.54(Physics, Condensed Matter)
O
under electric fieldKimura, Hiroyuki*; Wakimoto, Shuichi; Nishihata, Keisuke*; Noda, Yukio*; Kakurai, Kazuhisa; Kon, Keiichiro*
no journal, ,
Multiferroic materials are known to show gigantic magnetoelectric effects. One of the microscopic models for polarization in such systems is based on spin chirality. We have perfoermed polarized neutron scattering experiments using HoMnO single crystal to study correlation between the spin chirality and ferroelectric polarization. We found that the spin chirality is absent in the high temperature paraelectric HT-ICM phase whereas it appears in the ferroelectric LT-ICM phase. This fact demonstrates a strong coupling between the spin chirality and the ferroelctric polarization.
MnO (
Ho, Er)Wakimoto, Shuichi; Kimura, Hiroyuki*; Fukunaga, Mamoru*; Nishihata, Keisuke*; Takeda, Masayasu; Kakurai, Kazuhisa; Noda, Yukio*; Tokura, Yoshinori*
no journal, ,
Polarized neutron scattering experiments have been performed on multiferroic materials MnO (Ho, Er) under electric fields to study the direct relation between the electric polarization and the magnetic chiral structure of Mn spins. It is found that, after cooling in electric fields down to temperatures where the system has both commensurate magnetic order and ferroelectricity, the magnetic chiral order parameter is proportional to the polarization.
MnO (=Ho, Er)Wakimoto, Shuichi; Kimura, Hiroyuki*; Nishihata, Keisuke*; Fukunaga, Mamoru*; Takeda, Masayasu; Kakurai, Kazuhisa; Noda, Yukio*; Tokura, Yoshinori*
no journal, ,
Polarized neutron scattering experiments have been performed on multiferroic materials MnO (Ho, Er) under electric fields to study the direct relation between the electric polarization and the magnetic chiral structure of Mn spins. It is found that the magnetic chirality is proportional to the polarization, consisntent with the inverse-DM model.
MnO (Ho, Er)Wakimoto, Shuichi; Takeda, Masayasu; Kakurai, Kazuhisa; Kimura, Hiroyuki*; Fukunaga, Mamoru*; Nishihata, Keisuke*; Noda, Yukio*; Tokura, Yoshinori*
no journal, ,
Polarized neutron diffraction experiments have been performed on multiferroic materials MnO (Ho, Er) under electric fields in the ferroelectric commensurate (CM) and the low-temperature incommensurate (LT-ICM) phases. It is found that the magnetic chirality is proportional to the electric polarization and magnetic chirality can be switched by the polarity of the electric polarization in both the CM and LT-ICM phases. However, upon the transition from the CM to LT-ICM phase, the reduction of the electric polarization is not accompanied by any reduction of the magnetic chirality, implying that the CM and LT-ICM phases contain different mechanisms of the magnetoelectric coupling.
MnOWakimoto, Shuichi; Kimura, Hiroyuki*; Fukunaga, Mamoru*; Nishihata, Keisuke*; Takeda, Masayasu; Kakurai, Kazuhisa; Noda, Yukio*; Tokura, Yoshinori*
no journal, ,
Polarized neutron diffraction experiments have been performed on multiferroic materials MnO (Ho, Er) under electric fields in the ferroelectric commensurate (CM) and the low-temperature incommensurate (LT-ICM) phases. It is found that the magnetic chirality is proportional to the electric polarization and magnetic chirality can be switched by the polarity of the electric polarization in both the CM and LT-ICM phases. However, upon the transition from the CM to LT-ICM phase, the reduction of the electric polarization is not accompanied by any reduction of the magnetic chirality, implying that the CM and LT-ICM phases contain different mechanisms of the magnetoelectric coupling.
