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Anion Doping of Ferromagnetic Thin Films of La0.74Sr0.26MnO3−δ via Topochemical Fluorination

Anitha Sukkurji, Parvathy ; Molinari, Alan ; Reitz, Christian ; Witte, Ralf ; Kübel, Christian ; Chakravadhanula, Venkata ; Kruk, Robert ; Clemens, Oliver (2018):
Anion Doping of Ferromagnetic Thin Films of La0.74Sr0.26MnO3−δ via Topochemical Fluorination.
11, In: Materials, (7), p. 1204. MDPI, ISSN 1996-1944,
DOI: 10.3390/ma11071204,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Title: Anion Doping of Ferromagnetic Thin Films of La0.74Sr0.26MnO3−δ via Topochemical Fluorination
Language: English
Abstract:

Chemical doping via insertion of ions into the lattice of a host material is a key strategy to flexibly manipulate functionalities of materials. In this work, we present a novel case study on the topotactic insertion of fluoride ions into oxygen-deficient ferromagnetic thin films of La0.74Sr0.26MnO3−δ (LSMO) epitaxially grown onto single-crystal SrTiO3 (STO) substrates. The effect of fluorination on the film structure, composition, and magnetic properties is compared with the case of oxygen-deficient and fully-oxidized LSMO films. Although incorporation of F− anions does not significantly alter the volume of the LSMO unit cell, a strong impact on the magnetic characteristics, including a remarkable suppression of Curie temperature and saturation magnetization accompanied by an increase in magnetic coercivity, was found. The change in magnetic properties can be ascribed to the disruption of the ferromagnetic exchange interactions along Mn-anion-Mn chains driven by F− doping into the LSMO lattice. Our results indicate that F− doping is a powerful means to effectively modify the magnetic functional properties of perovskite manganites.

Journal or Publication Title: Materials
Series Volume: 11
Issue Number: 7
Publisher: MDPI
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese
Date Deposited: 31 Aug 2018 07:56
Last Modified: 22 Jan 2020 07:48
DOI: 10.3390/ma11071204
URN: urn:nbn:de:tuda-tuprints-77433
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/7743
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