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Topotactic Phase Transformation in Epitaxial SrCo 1‐ x Fe x O 3− δ Thin Films
Author(s) -
Nguyen Hien Thi Dieu,
Granville Simon,
Seidel Jan
Publication year - 2020
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201901204
Subject(s) - materials science , pulsed laser deposition , perovskite (structure) , brownmillerite , ferromagnetism , stoichiometry , thin film , epitaxy , squid , phase (matter) , analytical chemistry (journal) , magnetometer , crystallography , condensed matter physics , nanotechnology , chemistry , magnetic field , ecology , physics , organic chemistry , layer (electronics) , chromatography , quantum mechanics , biology
Epitaxial perovskite (P) and brownmillerite (BM) SrCo 0.67 Fe 0.33 O 3− δ thin films grown on (100) SrTiO 3 substrates by pulsed laser deposition are investigated by detailed X‐ray diffraction, conductive AFM, and SQUID magnetometry measurements regarding their structural, electronic, and magnetic properties. A topotactic phase transition between P and BM phases can be utilized to oxidize the material to stoichiometric perovskite SrCoO 3.0 by wet‐chemical oxidation with NaClO. The material exhibits weak magnetic properties up to room temperature and an additional clear ferromagnetic transition near 50 K.