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- W2023802181 abstract "In thin-film ${text{La}}_{0.6}{text{Ca}}_{0.4}{text{MnO}}_{3}$, conducting-tip and magnetic force microscopy reveal a pattern of nanoscale phase separation that is reproducible across cooling runs. This pattern represents the intersection of buried three-dimensional filamentary ferromagnetic metallic pathways with the sample surface. As an interlayer in current-perpendicular-to-the-plane trilayer devices, this phase-separated material magnetically decouples ferromagnetic metallic ${text{La}}_{0.7}{text{Ca}}_{0.3}{text{MnO}}_{3}$ electrodes which switch sharply. This yields sharp two-state low-field magnetoresistance that is also reproducible across cooling runs. The reproducibility and the magnitude of the resistance jump are linked to highly resistive $(ensuremath{sim}{10}^{ensuremath{-}12}text{ }ensuremath{Omega}text{ }{text{m}}^{2})$ constrained domain walls in the pathways of the phase-separated interlayer. Phase separation is normally associated with high-field colossal magnetoresistance and, therefore, its exploitation here to produce low-field effects is unusual." @default.
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- W2023802181 date "2008-08-07" @default.
- W2023802181 modified "2023-09-30" @default.
- W2023802181 title "Translating reproducible phase-separated texture in manganites into reproducible two-state low-field magnetoresistance: An imaging and transport study" @default.
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- W2023802181 doi "https://doi.org/10.1103/physrevb.78.054409" @default.
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