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• W1933486578 abstract "The concurrent ferromagnetic and metal-insulator transitions via the double-exchange route and electronic phase separation scenario represent the core ingredients of the physics of manganites. In this work, a Ca2+ and Ru4+ co-substitution of Pr3+ and Mn3+ in narrow-bandwidth and insulating PrMnO3, namely, Pr1-xCaxMn1-xRuxO3 (PCMRO, x ≤ 0.6), is carried out in order to investigate an alternative approach to effectively manipulate the ferromagnetism of PrMnO3-based manganites. It is revealed that PCMRO over the whole substitution range is homogeneous solid solution with increased lattice distortion. The preference of Ru4+ valence state and the absence of Mn4+ valence state disable the Mn3+-Mn4+ eg-orbital double-exchange, and the random occupation of Ru4+ in the lattice excludes the charge ordering and electronic phase separation. While all these consequences should favor antiferromagnetic insulating states, nevertheless, a high-temperature ferromagnetic transition is triggered by the co-substitution and the magnetization can reach up to ∼1.0 μB/f.u. at x ∼ 0.2–0.3, much bigger than the moment (&lt;0.1 μB/f.u.) of Pr1−xCaxMnO3 in the weak ferromagnetic insulator state. It is suggested that this strong ferromagnetism is substantially ascribed to the Mn3+-Ru4+ t2g-orbital ferromagnetic super-exchange, and a simple geometric network illustration of the magnetism and electrical transport is presented." @default.
• W1933486578 created "2016-06-24" @default.
• W1933486578 creator A5030042849 @default.
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• W1933486578 date "2015-09-23" @default.
• W1933486578 modified "2023-10-08" @default.
• W1933486578 title "Manipulating the ferromagnetism in narrow-bandwidth Pr1-<i>x</i>Ca<i>x</i>MnO3 (0 ≤ <i>x</i> ≤ 0.6) by means of the Mn-Ru <i>t2g</i> ferromagnetic super-exchanges" @default.
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• W1933486578 doi "https://doi.org/10.1063/1.4931675" @default.
• W1933486578 hasPublicationYear "2015" @default.
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