Current-induced enhancement of magnetic anisotropy in spin-charge-coupled multiferroic YbFeO

Yoshii, Kenji; Matsumura, Daiju; Saito, Hiroyuki; Kambe, Takashi*; Fukunaga, Mamoru*; Muraoka, Yuji*; Ikeda, Naoshi*; Mori, Shigeo*

Journal of the Physical Society of Japan, 83(6), p.063708_1 - 063708_4, 2014/06

https://doi.org/10.7566/JPSJ.83.063708

We report the change of magnetic properties of multiferroic YbFeO, caused by cooling in the presence of an electrical current. The magnetization measured after the cooling becomes smaller by about 10-20% than that after cooling without a current. The current also affects the magnetic anisotropy below about 100 K; the magnetic coercivity is increased by about 10-20%. These phenomena may arise from a coexistence of ferromagnetic and antiferromagnetic domains, or a disturbance in the formation of charge-ordered domains. From the applied viewpoint, the enhancement of anisotropy by an electrical current offers a method for stabilizing magnetization other than the well-known method, i.e., exchange bias.

Spin chirality and electric polarization in multiferroic compounds RMnO ( = 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

https://doi.org/10.1016/j.physb.2009.06.012

Magnetic-field-induced magnetic phase transitions associated with ferroelectricity in multiferroic ErMnO

Kimura, Hiroyuki*; Wakimoto, Shuichi; Fukunaga, Mamoru*; Noda, Yukio*; Kaneko, Koji; Metoki, Naoto; Kakurai, Kazuhisa; Kay, Kohn*

Journal of the Physical Society of Japan, 78(3), p.034718_1 - 034718_5, 2009/03

https://doi.org/10.1143/JPSJ.78.034718

Linear relation between magnetic chirality and spontaneous polarizatin in multiferroic 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.

Magnetic chirality and electric polarization in multiferroic MnO

Wakimoto, 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.

Spin chirality and electric polarization in Ga-doped YMn(MnGa)O

Wakimoto, Shuichi; Kakurai, Kazuhisa; Sakamoto, Yuma*; Fukunaga, Mamoru*; Kimura, Hiroyuki*; Noda, Yukio*

no journal, , 

no abstracts in English

Magnetic chirality and electric polarization in multiferroic YMnO

Wakimoto, Shuichi; Kimura, Hiroyuki*; Fukunaga, Mamoru*; Sakamoto, Yuma*; Noda, Yukio*; Kakurai, Kazuhisa

no journal, , 

A Role of the magnetic chirality in polarization flip in YMnO

Wakimoto, Shuichi; Kimura, Hiroyuki*; Fukunaga, Mamoru*; Sakamoto, Yuma*; Takeda, Masayasu; Kakurai, Kazuhisa; Noda, Yukio*

no journal, ,