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Magnetic field-induced dielectric phase transition and incommensurate-commensurate magnetic phase transition in multiferroic compounds of $$R$$Mn$$_{2}$$O$$_{5}$$

Kimura, Hiroyuki*; Wakimoto, Shuichi  ; Kamada, Yoichi*; Noda, Yukio*; Kakurai, Kazuhisa; Kaneko, Koji   ; Metoki, Naoto   ; Kon, Keiichiro*

$$R$$Mn$$_{2}$$O$$_{5}$$($$R=$$ rare earth, Bi, Y) systen achieves a multi-ferroic state where magnetic and ferroelectric orders coexist. We have performed neutron diffraction under magnetic field to study the correlation between field-induced magnetism and ferroelectricity. T-H phase diagram of the magnetic and electric states for two samples, HoMn$$_2$$O$$_5$$ and ErMn$$_2$$O$$_5$$, shows perfect agreement between the commensurate-incommensurate magnetic phase boundary and the ferroelectric transition, evincing that the commensurate magnetic state is essential for the ferroelectric state in this system.

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Japanese

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Meeting title

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日本中性子科学会第6回年会

Held date

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2006/12

Location (city)

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水戸

Location (country)

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日本

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Keywords

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no keyword

Research Facility

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JRR-3M(研究炉3)  

Press Release

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Article of JAEA R&D Review

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Accesses

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- Accesses

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