Canted Antiferromagnetic Order and Large Magnetoresistance Effect in La_<1-X>Ca_XMnO_3, Pr_<1-X>Ca_XMnO_3 and other RE_<1-X>AE_XMnO_3 Manganese Oxides (X〜0.9) : Condensed Matter: Electronic Properties, etc.

概要

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The magnetization M(T) and the electrical resistivity ρ(T) of lightly electron-doped La_<1-x>Ca_xMnO_3, Pr_<1-x>MnO_3 and other RE_<1-x>AE_xMnO_3 (RE; rare-earth, AE; alkaline-earth) have been measured and the canted antiferromagnetic (CAF) phase which competes with the charge ordered (CO) phase has been extensively studied. The CAF phase was found to be more strongly stabilized for the smaller A-site ion radius of the perovskite structure. By systematically changing the concentration and the average A-side ion radius, a detailed phase diagram in the electron-doped region was established. The main origin of the CAF phase was suggested to be the antisymmetric exchange interaction associated with the G-type antiferromagnetic structure of these systems.
社団法人日本物理学会の論文
2000-06-15