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Thickness-dependent magnetism in epitaxial SrFeO3-δ thin films

Palakkal, Jasnamol P. and Zeinar, Lukas and Major, Marton and Komissinskiy, Philipp and Schneider, Thorsten and Alff, Lambert (2020):
Thickness-dependent magnetism in epitaxial SrFeO3-δ thin films.
In: IEEE Transactions on Magnetics, 56, p. 1. Institute of Electrical and Electronics Engineers (IEEE), ISSN 0018-9464,
DOI: 10.1109/TMAG.2020.3023372,
[Article]

Abstract

Strained oxygen-deficient perovskite SrFeO3-δ films have been epitaxially grown by pulsed laser deposition on SrTiO3 (001) substrates. Oxygen deficiency of the films in comparison with the stoichiometric perovskite SrFeO3 is manifested in the increased lattice parameter, c = 3.97 Å, the decreased mass density, ρ = 4.825 g cm-3, and the presence of Fe3+ cations. The SrFeO3-δ perovskite structure is monoclinically distorted with an increase of the film thickness, resulting in the reduction of the total magnetic moment. A wasp-waisted hysteresis loop and a negative exchange bias are observed for the 69 nm thick film due to the possible magnetic sublayers arising from a proper monoclinically distorted surface layer and a substrate-locked core layer.

Item Type: Article
Erschienen: 2020
Creators: Palakkal, Jasnamol P. and Zeinar, Lukas and Major, Marton and Komissinskiy, Philipp and Schneider, Thorsten and Alff, Lambert
Title: Thickness-dependent magnetism in epitaxial SrFeO3-δ thin films
Language: English
Abstract:

Strained oxygen-deficient perovskite SrFeO3-δ films have been epitaxially grown by pulsed laser deposition on SrTiO3 (001) substrates. Oxygen deficiency of the films in comparison with the stoichiometric perovskite SrFeO3 is manifested in the increased lattice parameter, c = 3.97 Å, the decreased mass density, ρ = 4.825 g cm-3, and the presence of Fe3+ cations. The SrFeO3-δ perovskite structure is monoclinically distorted with an increase of the film thickness, resulting in the reduction of the total magnetic moment. A wasp-waisted hysteresis loop and a negative exchange bias are observed for the 69 nm thick film due to the possible magnetic sublayers arising from a proper monoclinically distorted surface layer and a substrate-locked core layer.

Journal or Publication Title: IEEE Transactions on Magnetics
Journal volume: 56
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Uncontrolled Keywords: Exchange bias, Magnetic materials, Oxides, Thin films
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
Date Deposited: 20 Nov 2020 11:50
DOI: 10.1109/TMAG.2020.3023372
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