Tailoring of magnetism and electron transport of manganate thin films by 
controlling the Mn–O–Mn bond angles via strain engineering

Henning, P.; Gruhl, R.; Ross, U.; Roddatis, Vladimir; Bruchmann-Bamberg, V.; Stroh, K. P.; Seibt, M.; Gegenwart, P.; Moshnyaga, V.

doi:10.1038/s41598-024-53722-9

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Tailoring of magnetism and electron transport of manganate thin films by controlling the Mn–O–Mn bond angles via strain engineering

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Henning, P.
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Gruhl, R.
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Ross, U.
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/persons/resource/roddatis

Roddatis, Vladimir
3.5 Interface Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Bruchmann-Bamberg, V.
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Stroh, K. P.
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Seibt, M.
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Gegenwart, P.
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Moshnyaga, V.
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Citation

Henning, P., Gruhl, R., Ross, U., Roddatis, V., Bruchmann-Bamberg, V., Stroh, K. P., Seibt, M., Gegenwart, P., Moshnyaga, V. (2024): Tailoring of magnetism and electron transport of manganate thin films by controlling the Mn–O–Mn bond angles via strain engineering. - Scientific Reports, 14, 3253.
https://doi.org/10.1038/s41598-024-53722-9

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025545

Abstract

Strain engineering beyond substrate limitation of colossal magnetoresistant thin (La0.6Pr0.4)0.7Ca0.3MnO3 (LPCMO) films on LaAlO3-buffered SrTiO3 (LAO/STO) substrates has been demonstrated using metalorganic aerosol deposition technique. By growing partially relaxed 7–27 nm thick heteroepitaxial LAO buffer layers on STO a perfect lattice matching to the LPCMO has been achieved. As a result, strain-free heteroepitaxial 10–20 nm thick LPCMO/LAO/STO films with bulk-like ferromagnetic metallic ground state were obtained. Without buffer the coherently strained thin LPCMO/STO and LPCMO/LAO films were insulating and weakly magnetic. The reason for the optimized magnetotransport in strain-free LPCMO films was found to be a large octahedral Mn–O–Mn bond angle φOOR ~ 166–168° as compared to the significantly smaller one of φOOR ~ 152–156° determined for the tensile (LPCMO/STO) and compressively (LPCMO/LAO) strained films.