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Magnetic chirality and electric polarization in multiferroic YMn$$_{2}$$O$$_{5}$$

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

There are two candidates of the origin of the magnetic-driven ferroelectricity in YMn$$_{2}$$O$$_{5}$$, one is the $$S$$$$times$$$$S$$ model and the other is the $$S$$$$cdot$$$$S$$ model. We have measured spin chirality and polarization of YMn$$^{4+}$$(Mn$$_{1-x}$$Ga$$_{x}$$)$$^{3+}$$O$$_{5}$$ where non-magnetic Ga ions dilute the $$S$$$$cdot$$$$S$$ contribution. We have succeeded to separate these two contributions, and found that the $$S$$$$times$$$$S$$ mechanism is dominant in the low-temperature phase while the $$S$$$$cdot$$$$S$$ mechanism is dominant in the intermediate temperature phase.

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English

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International Workshop on Spin Chirality and Dzyaloshinskii-Moriya Interaction (DMI Workshop)

Held date

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2011/05

Location (city)

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St.Petersburg

Location (country)

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Russia

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no keyword

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JRR-3M(研究炉3)  

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- Accesses

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