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Magnetic structure and local lattice distortion in giant negative thermal expansion material Mn$$_{3}$$Cu$$_{1-x}$$Ge$$_{x}$$N

巨大負の熱膨張材料Mn$$_{3}$$Cu$$_{1-x}$$Ge$$_{x}$$Nにおける磁気構造と局所構造ひずみ

飯久保 智*; 樹神 克明   ; 竹中 康司*; 高木 英典*; 社本 真一  

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

Magnetic and local structures in an antiperovskite system, Mn$$_{3}$$Cu$$_{1-x}$$Ge$$_{x}$$N, with a giant negative thermal expansion have been studied by neutron powder diffraction measurement. We discuss (1) an importance of an averaged cubic crystal structure and a $$Gamma$$$$^{5g}$$ antiferromagnetic spin structure for the large magneto-volume effect (MVE) in this itinerant electron system, (2) an unique role of a local lattice distortion well described by the low temperature tetragonal structure of Mn$$_{3}$$GeN for the broadening of MVE.

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パーセンタイル:80.96

分野:Biophysics

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