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Polarized neutron diffraction study of magnetic chirality in YMn$$^{4+}$$(Mn$$_{1-x}$$Ga$$_{x}$$)$$^{3+}$$O$$_{5}$$

偏極中性子によるYMn$$^{4+}$$(Mn$$_{1-x}$$Ga$$_{x}$$)$$^{3+}$$O$$_{5}$$の磁気カイラリティの研究

脇本 秀一  

Wakimoto, Shuichi

There are two models proposed as an origin of mognetoelectric effects in $$R$$Mn$$_{2}$$O$$_{5}$$ ($$R$$: rare earth, Bi, Y): one is the inverse DM mechanism and the other is the exchange striction mechanism. The former is driven by the cycloidal arrangements of Mn$$^{4+}$$ spins and the latter is driven by the Mn$$^{4+}$$-Mn$$^{3+}$$ chains. In order to distinguish these two models, we have carried polarized neutron diffraction under electric filed using single crystals of YMn$$^{4+}$$(Mn$$_{1-x}$$Ga$$_{x}$$)$$^{3+}$$O$$_{5}$$ and studied the relation between the magnetic chirality and electric polarization. We have found that the ferroelectricity in the CM phase originates from the exchange striction mechanism, while the inverse-DM mechanism is dominant in the ICM phase in which a rich variety of ME effects are observed.

使用言語

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English

掲載資料名

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巻

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号

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ページ数

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発行年月

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発表会議名

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10th International Conference on Polarized Neutrons for Condensed Matter Investigations (PNCMI 2014)

開催年月

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2014/09

開催都市

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Sydney

開催国

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Australia

キーワード

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偏極中性子; マルチフェロイック

特許データ

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PDF

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研究データの公開先DOI

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使用施設

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JRR-3M(研究炉3)  

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論文解説記事
(成果普及情報誌)

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受委託・共同研究相手機関

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