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Journal Articles

Magnetic-field-induced polarization flop in multiferroic TmMn$$_{2}$$O$$_{5}$$

Fukunaga, Mamoru*; Sakamoto, Yuma*; Kimura, Hiroyuki*; Noda, Yukio*; Abe, Nobuyuki*; Taniguchi, Koji*; Arima, Takahisa*; Wakimoto, Shuichi; Takeda, Masayasu; Kakurai, Kazuhisa; et al.

Physical Review Letters, 103(7), p.077204_1 - 077204_4, 2009/08

https://doi.org/10.1103/PhysRevLett.103.077204
 Times Cited Count：50 Percentile：86.01(Physics, Multidisciplinary)

Journal Articles

Ferroelectricity induced by incommensurate-commensurate magnetic phase transition in multiferroic HoMn$$_2$$O$$_5$$

Kimura, Hiroyuki*; Kamada, Yoichi*; Noda, Yukio*; Kaneko, Koji; Metoki, Naoto; Kohn, Key*

Journal of the Physical Society of Japan, 75(11), p.113701_1 - 113701_4, 2006/11

https://doi.org/10.1143/JPSJ.75.113701
 Times Cited Count：36 Percentile：80.12(Physics, Multidisciplinary)

Neutron diffraction measurements under high magnetic fields in multiferroic HoMn$$_2$$O$$_5$$ have revealed a clear relationship between microscopic magnetism and field-induced ferroelectricity. The applied magnetic field induces a first-order phase transition from an incommensurate magnetic order to a commensurate magnetic order, where a spontaneous electric polarization occurs. The one-to-one correspondence between the magnetic phase diagram and the dielectric phase diagram under magnetic field clearly indicates that the electric polarization is magnetically induced and the commensurate magnetic structure is indispensable to the ferroelectricity in the multiferroic ${it R}$Mn$$_2$$O$$_5$$ system.

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