000106648 001__ 106648
000106648 005__ 20230519145408.0
000106648 0247_ $$2doi$$a10.1021/acsomega.1c00953
000106648 0248_ $$2sideral$$a124476
000106648 037__ $$aART-2021-124476
000106648 041__ $$aeng
000106648 100__ $$0(orcid)0000-0002-6944-4713$$aLangenberg, Eric
000106648 245__ $$aRelaxation Mechanisms and Strain-Controlled Oxygen Vacancies in Epitaxial SrMnO3 Films
000106648 260__ $$c2021
000106648 5060_ $$aAccess copy available to the general public$$fUnrestricted
000106648 5203_ $$a: SrMnO3 has a rich epitaxial strain-dependent ferroic phase diagram, in which a variety of magnetic orderings, even ferroelectricity, and thus multiferroicity, are accessible by gradually modifying the strain. Different relaxation processes, though, including the presence of strain-induced oxygen vacancies, can severely curtail the possibility of stabilizing these ferroic phases. Here, we report on a thorough investigation of the strain relaxation mechanisms in SrMnO3 films grown on several substrates imposing varying degrees of strain from slightly compressive (−0.39%) to largely tensile ≈+3.8%. First, we determine the strain dependency of the critical thickness (tc) below which pseudomorphic growth is obtained. Second, the mechanisms of stress relaxation are elucidated, revealing that misfit dislocations and stacking faults accommodate the strain above tc. Yet, even for films thicker than tc, the atomic monolayers below tc are proved to remain fully coherent. Therefore, multiferroicity may also emerge even in films that appear to be partially relaxed. Last, we demonstrate that fully coherent films with the same thickness present a lower oxygen content for increasing tensile mismatch with the substrate. This behavior proves the coupling between the formation of oxygen vacancies and epitaxial strain, in agreement with first-principles calculations, enabling the
strain control of the Mn3+/Mn4+ ratio, which strongly affects the magnetic and electrical properties. However, the presence of oxygen vacancies/Mn3+ cations reduces the effective epitaxial strain in the SrMnO3 films and, thus, the accessibility to the strain-induced multiferroic phase.
000106648 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E13-20R$$9info:eu-repo/grantAgreement/ES/DGA/E28-20R$$9info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 823717-ESTEEM3$$9info:eu-repo/grantAgreement/ES/MICINN/MAT2017-82970-C2-1-R$$9info:eu-repo/grantAgreement/ES/MICINN/MAT2017-82970-C2-2-R
000106648 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000106648 590__ $$a4.132$$b2021
000106648 592__ $$a0.708$$b2021
000106648 594__ $$a5.2$$b2021
000106648 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b73 / 180 = 0.406$$c2021$$dQ2$$eT2
000106648 593__ $$aChemistry (miscellaneous)$$c2021$$dQ1
000106648 593__ $$aChemical Engineering (miscellaneous)$$c2021$$dQ1
000106648 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000106648 700__ $$aMaurel, Laura
000106648 700__ $$0(orcid)0000-0001-5661-7964$$aAntorrena, Guillermo
000106648 700__ $$0(orcid)0000-0002-4698-3378$$aAlgarabel, Pedro A.
000106648 700__ $$0(orcid)0000-0002-6761-6171$$aMagén, César$$uUniversidad de Zaragoza
000106648 700__ $$0(orcid)0000-0002-0111-8284$$aPardo, José A.$$uUniversidad de Zaragoza
000106648 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000106648 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal.
000106648 773__ $$g6, 20 (2021), 13144–13152$$pACS Omega$$tACS OMEGA$$x2470-1343
000106648 8564_ $$s4364904$$uhttps://zaguan.unizar.es/record/106648/files/texto_completo.pdf$$yVersión publicada
000106648 8564_ $$s3310642$$uhttps://zaguan.unizar.es/record/106648/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000106648 909CO $$ooai:zaguan.unizar.es:106648$$particulos$$pdriver
000106648 951__ $$a2023-05-18-13:51:55
000106648 980__ $$aARTICLE