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Weak ferromagnetic ordering disordered by Rh$$^{3+}$$ ions for LaCo$$_{0.8}$$Rh$$_{0.2}$$O$$_{3}$$

Asai, Shinichiro*; Okazaki, Ryuji*; Terasaki, Ichiro*; Yasui, Yukio*; Igawa, Naoki; Kakurai, Kazuhisa

We have carried out the neutron scattering measurements for a single crystal of LaCo$$_{0.8}$$Rh$$_{0.2}$$O$$_{3}$$ in order to investigate the ferromagnetic ordering induced by Rh$$^{3+}$$ substitution for Co$$^{3+}$$ of LaCoO$$_{3}$$. The ordered moment is evaluated to be 0.4$$pm$$0.2$$mu$$$$_{B}$$, which is consistent with the saturation magnetization of LaCo$$_{0.8}$$Rh$$_{0.2}$$O$$_{3}$$. It indicates that the ferromagnetic ordering of LaCo$$_{0.8}$$Rh$$_{0.2}$$O$$_{3}$$ originates from the short-range ferromagnetic ordering disordered by Rh$$^{3+}$$ ions.

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