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The tetragonal axis of the films grown up to a 35\u2009nm thickness is perpendicular to the film surface and the basal lattice parameters are imposed by the cubic structure of the substrate. Furthermore, the emergence of a spontaneous electric polarization below ~32\u2009K points to the stabilization of an improper ferroelectric phase at low temperatures, which is not observed in bulk GdMnO<jats:sub>3<\/jats:sub>. This work shows how strain engineering can be used to tailor the structure and properties of strongly correlated oxides.<\/jats:p>","DOI":"10.1038\/s41598-019-55227-2","type":"journal-article","created":{"date-parts":[[2019,12,10]],"date-time":"2019-12-10T11:03:32Z","timestamp":1575975812000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Strain-Engineered Tetragonal Phase and Ferroelectricity in GdMnO3 Thin Films Grown on SrTiO3 (001)"],"prefix":"10.1038","volume":"9","author":[{"given":"P.","family":"Machado","sequence":"first","affiliation":[]},{"given":"F. G.","family":"Figueiras","sequence":"additional","affiliation":[]},{"given":"R.","family":"Vilarinho","sequence":"additional","affiliation":[]},{"given":"J. R. A.","family":"Fernandes","sequence":"additional","affiliation":[]},{"given":"P. B.","family":"Tavares","sequence":"additional","affiliation":[]},{"given":"M. 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