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CuO$$_{2}$$リボン鎖を持つA$$_{2}$$Cu$$_{2}$$Mo$$_{3}$$O$$_{12}$$(A=Rb, Cs)の磁気的挙動と磁気構造

Magnetic behavior and magnetic structure of CuO$$_{2}$$ ribbon system A$$_{2}$$Cu$$_{2}$$Mo$$_{3}$$O$$_{12}$$ (A=Rb, Cs)

藤村 明央*; 安井 幸夫*; 河野 洋平*; 橘高 俊一郎*; 榊原 俊郎*; 井川 直樹 ; 松川 健*; 吉田 幸彦*; 星川 晃範*; 石垣 徹*

Fujimura, Akio*; Yasui, Yukio*; Kono, Yohei*; Kittaka, Shunichiro*; Sakakibara, Toshiro*; Igawa, Naoki; Matsukawa, Takeshi*; Yoshida, Yukihiko*; Hoshikawa, Akinori*; Ishigaki, Toru*

CuO$$_{2}$$リボン鎖系A$$_{2}$$Cu$$_{2}$$Mo$$_{3}$$O$$_{12}$$ (A=Rb, Cs)について、磁気比熱を測定し、中性子回折実験によってそれら物質の磁気構造を解析した。Cs$$_{2}$$Cu$$_{2}$$Mo$$_{3}$$O$$_{12}$$の中性子回折実験では、磁気反射は全て核反射上に観察されたことなどから、本物質はcollinearな反強磁性を持つことが分った。これらの結果を基にA$$_{2}$$Cu$$_{2}$$Mo$$_{3}$$O$$_{12}$$ (A=Rb, Cs)の磁気的挙動と磁気構造の関係について議論を行う。

The magnetic behavior and magnetic structure of A$$_{2}$$Cu$$_{2}$$Mo$$_{3}$$O$$_{12}$$ (A=Rb, Cs) with CuO$$_{2}$$ ribbon chains have been studied by using specific heat measurement and neutron diffraction method. Cs$$_{2}$$Cu$$_{2}$$Mo$$_{3}$$O$$_{12}$$ showed collinear-antiferromagnetic structure analyzed by the neutron diffraction. The relation between magnetic behavior and magnetic for those materials are discussed.

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