Universität zu Köln

Bohr, Christoph ORCID: 0000-0002-8427-8346, Yu, Pengmei, Scigaj, Mateusz, Hegemann, Corinna, Fischer, Thomas, Coll, Mariona ORCID: 0000-0001-5157-7764 and Mathur, Sanjay (2020). Atomic scale growth of GdFeO3 perovskite thin films. Thin Solid Films, 698. LAUSANNE: ELSEVIER SCIENCE SA. ISSN 0040-6090

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Abstract

Thin films of multiferroic gadolinium orthoferrite (GdFeO3) are of significant interest due to intrinsic coupling of magnetic and ferroelectric order in their monolithic bimetallic structures relevant for potential applications in magneto-optical data storage devices. Formation of this composition in stoichiometric pure form is challenging due to facile formation of the thermodynamically preferred garnet phase (Gd3Fe5O12) that mostly coexists as a minor phase in gadolinium orthoferrite films. We report herein the selective epitaxial growth of GdFeO3 films by atomic layer deposition of a single bimetallic precursor [GdFe((OBu)-Bu-t)(6)(C5H5N)(2)] containing Gd:Fe in the required stoichiometric ratio, and using ozone as co-reactant. Intact vaporisation of [GdFe((OBu)-Bu-t)(6)(C5H5N)(2)] in the gas phase and its clean conversion into the complex oxide phase as validated by mass spectral studies and thermogravimetry demonstrate the potential of the Gd-Fe compound as an efficient single-source precursor. Epitaxial growth of GdFeO3 on SrTiO3 substrates was confirmed by X-ray diffraction analysis, whereas the presence of Fe3+ and Gd3+ without any traces of N species from the ligands was verified by X- ray photoelectron spectroscopy. Magnetic properties of the resulting perovskite films studied by superconducting quantum interference device measurements revealed the superposition of two independent magnetic contributions due to paramagnetic (Gd3+) and ferromagnetic (Fe3+) sublattices in GdFeO3.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bohr, Christoph UNSPECIFIED orcid.org/0000-0002-8427-8346 UNSPECIFIED Yu, Pengmei UNSPECIFIED UNSPECIFIED UNSPECIFIED Scigaj, Mateusz UNSPECIFIED UNSPECIFIED UNSPECIFIED Hegemann, Corinna UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Coll, Mariona UNSPECIFIED orcid.org/0000-0001-5157-7764 UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-340023
DOI:	10.1016/j.tsf.2020.137848
Journal or Publication Title:	Thin Solid Films
Volume:	698
Date:	2020
Publisher:	ELSEVIER SCIENCE SA
Place of Publication:	LAUSANNE
ISSN:	0040-6090
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language IRON-OXIDE FILMS; LAYER DEPOSITION; GADOLINIUM ORTHOFERRITE; ALUMINUM-OXIDE; REFEO3 RE; MOCVD; ALD; PRECURSORS; SYSTEMS; EU Multiple languages Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/34002