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• W1631038645 abstract "Magnetic properties of ${mathrm{Sm}}_{0.2}{mathrm{Ca}}_{0.8}{mathrm{Mn}}_{1ensuremath{-}x}{mathrm{Ru}}_{x}{mathrm{O}}_{3}$ $(x=0,$ 0.04, and 0.08) are investigated in the temperature range 4.2--240 K, external magnetic fields up to 15 kOe and hydrostatic pressure up to 12 kbar. Transport properties of ${mathrm{Sm}}_{0.2}{mathrm{Ca}}_{0.8}{mathrm{Mn}}_{0.92}{mathrm{Ru}}_{0.08}{mathrm{O}}_{3}$ are also investigated in the temperature range 77--280 K and under pressure up to 10 kbar. It is found that for a pristine phase $(x=0),$ hydrostatic pressure increases the ferromagnetic domains embedded in an antiferromagnetic matrix, and slightly decreases the N'eel temperature. The effect of pressure on the magnetic interactions depends upon Ru doping. For ${mathrm{Sm}}_{0.2}{mathrm{Ca}}_{0.8}{mathrm{Mn}}_{0.96}{mathrm{Ru}}_{0.04}{mathrm{O}}_{3}$ an applied pressure decreases both Curie and N'eel temperatures, but enhances the ferromagnetic fraction. In the case of ${mathrm{Sm}}_{0.2}{mathrm{Ca}}_{0.8}{mathrm{Mn}}_{0.92}{mathrm{Ru}}_{0.08}{mathrm{O}}_{3}$ an applied pressure suppresses the ferromagnetic interactions and surprisingly increases the resistivity. To the best of our knowledge this is the first time that such an effect was observed in perovskites. All of the above observations are discussed in the context of phase separation." @default.
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• W1631038645 date "2002-05-30" @default.
• W1631038645 modified "2023-10-18" @default.
• W1631038645 title "Ferromagnetism and metallicity in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Sm</mml:mi></mml:mrow><mml:mrow><mml:mn>0.2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ca</mml:mi></mml:mrow><mml:mrow><mml:mn>0.8</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Mn</mml:mi></mml:mrow><mml:mrow><mml:mn>1</…" @default.
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• W1631038645 doi "https://doi.org/10.1103/physrevb.65.224415" @default.
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