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Strain-Engineered Ferromagnetism in LaMnO3 Thin Films

AutorRoqueta, Jaume ; Pomar, Alberto ; Balcells Argemi, Lluis; Frontera Beccaria, Carlos; Valencia, Sergio; Abrudan, Radu; Bozzo Closas, Bernat; Konstantinović, Zorica ; Santiso, José ; Martínez Perea, Benjamín
Palabras claveOxide thin films
Strain induced effects
Magnetism
Fecha de publicación6-sep-2015
EditorAmerican Chemical Society
CitaciónCrystal Growth and Design 15(11): 5332-5337 (2015)
ResumenA systematic study of the growth process of LaMnO3 (LMO) thin films, by pulsed laser deposition, on top of SrTiO3 substrates under different oxygen partial pressures (PO2) is reported. It is found that the accommodation of the orthorhombic LMO phase onto the cubic STO structure, i.e. the amount of structural strain, is controlled by background oxygen pressure. We demonstrate that magnetic behaviour can be continuously tuned from robust ferromagnetic (FM) ordering to an antiferromagnet. These results strongly point to a strain-induced selective orbital occupancy as the origin of the observed FM behaviour, in agreement with recent theoretical calculations.
Versión del editorhttp://pubs.acs.org/doi/ipdf/10.1021/acs.cgd.5b00884
URIhttp://hdl.handle.net/10261/127484
ISSN1528-7483
E-ISSN1528-7505
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