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Non-percolating small metallic clusters and sharp suppression of metallicity in RE0.55Sr0.45Mn1−xRuxO3 manganites

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Abstract

The origin of the anomalous sharp phase transition from a ferromagnetic metal into a ferromagnetic insulator has been investigated in ruthenium (Ru)-doped RE0.55Sr0.45Mn1−xRuxO3 (0 ≤ x ≤ 0.25) manganites (RESRMO) with RE(A-site) = Sm, Eu and Gd. The transition is independent of RE and occurs at a Ru doping level x of around 0.16–0.18. The analysis of the temperature derivative of the resistivity and the magneto-resistance at high temperatures as a function of x suggests that the suppression of metallicity originates from the doping driven magnetic/spin disorder that coexist within the ferromagnetic metallic/insulating matrix in these compounds.

Graphical abstract: Non-percolating small metallic clusters and sharp suppression of metallicity in RE0.55Sr0.45Mn1−xRuxO3 manganites

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Publication details

The article was received on 14 Apr 2017, accepted on 24 Dec 2017 and first published on 02 Jan 2018


Article type: Paper
DOI: 10.1039/C7CP02423A
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
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    Non-percolating small metallic clusters and sharp suppression of metallicity in RE0.55Sr0.45Mn1−xRuxO3 manganites

    H. S. Alagoz, I. Živković, K. H. Chow and J. Jung, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C7CP02423A

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