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Magneto volume effect of Mn$$_3$$Cu$$_{1-x}$$Ge$$_x$$N

Iikubo, Satoshi; Takenaka, Koshi*; Kodama, Katsuaki   ; Takagi, Hidenori*; Shamoto, Shinichi  

Crystal and magnetic structures of the anti-perovskite system Mn$$_3$$Cu$$_{1-x}$$Ge$$_x$$N, which show large negative thermal expansion coefficients around the room temperature have been investigated by the neutron diffraction study. Obtained results indicate that the cubic crystal structure and $$Gamma^{5g}$$ anti-ferromagnetic structure are essential for large magneto-volume effect in this system. In the Mn$$_3$$Cu$$_{0.5}$$Ge$$_{0.5}$$N, experimental evidences of coexistence of two magnetic structure, $$Gamma^{5g}$$ and $$Gamma^{4g}$$ anti-ferromagnetic structures are revealed around room temperature where the colossal negative thermal expansion coefficient appears.

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Japanese

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Publication Year/Month

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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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Cooperating Institute

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Accesses

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- Accesses

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