2022
DOI: 10.1088/1361-6463/ac5a1f
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Tunable magnetic and magnetotransport properties in locally epitaxial La0.67Sr0.33MnO3 thin films on polycrystalline SrTiO3, by control of grain size

Abstract: La0.67Sr0.33MnO3 (LSMO) thin films have been grown by pulsed laser deposition on SrTiO3 using combinatorial substrate epitaxy (CSE) approach, i.e. polycrystalline substrates with micrometer-size grains. The crystallographic domains size of those polycrystalline substrates can be controlled between 2 to 45 µm depending on the annealing temperature during synthesis. Each grain of the substrate acts as a single crystalline growth template promoting local epitaxy with a reproduction of the substrate grain structur… Show more

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Cited by 4 publications
(3 citation statements)
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References 61 publications
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“…The grain metric is important for the introduction of grain boundaries and the tunability of the thin films functional properties. For example, those grain boundaries can bring extrinsic properties to the thin films such as in LSMO, which are not present for single crystal films (see figure 7) [10]. As we can see, at low temperature, single crystal films present a very small MR, whereas, the polycrystalline substrates induce new effect on the LSMO films with low field Magnetoresistance (LFMR), and an important MR. More importantly, those effects can be tuned by their density in the films as seen on figure 7, where this MR tends to increase with the decrease of the grain size and therefore the importance of the grain metric control of the polycrystalline substrates.…”
Section: F Discussionmentioning
confidence: 92%
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“…The grain metric is important for the introduction of grain boundaries and the tunability of the thin films functional properties. For example, those grain boundaries can bring extrinsic properties to the thin films such as in LSMO, which are not present for single crystal films (see figure 7) [10]. As we can see, at low temperature, single crystal films present a very small MR, whereas, the polycrystalline substrates induce new effect on the LSMO films with low field Magnetoresistance (LFMR), and an important MR. More importantly, those effects can be tuned by their density in the films as seen on figure 7, where this MR tends to increase with the decrease of the grain size and therefore the importance of the grain metric control of the polycrystalline substrates.…”
Section: F Discussionmentioning
confidence: 92%
“…All STO ceramics were synthetized starting from the two precursors TiO2 and SrCO3 [10]. These precursors were calcined for 12 hours at 1200 °C.…”
Section: Methodsmentioning
confidence: 99%
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