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Controlling magnetic coupling in bi-magnetic nanocomposites
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.ORCID iD: 0000-0001-7508-0752
Jozef Stefan Inst, Adv Mat Dept, Ljubljana 1000, Slovenia;Univ Belgrade, Vinca Inst Nucl Sci, Lab Phys, Belgrade 11000, Serbia.
Univ Politecn Marche, Dept SIMAU, Via Brecce Bianche, I-60131 Ancona, Italy.
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2019 (English)In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 11, no 30, p. 14256-14265Article in journal (Refereed) Published
Abstract [en]

Magnetic nanocomposites constitute a vital class of technologically relevant materials, in particular for next-generation applications ranging from biomedicine, catalysis, and energy devices. Key to designing such materials is determining and controlling the extent of magnetic coupling in them. In this work, we show how the magnetic coupling in bi-magnetic nanocomposites can be controlled by the growth technique. Using four different synthesis strategies to prepare prototypical LaFeO3-CoFe2O4 and LaFeO3-Co0.5Zn0.5Fe2O4 nanocomposite systems, and by performing comprehensive magnetic measurements, we demonstrate that the final material exhibits striking differences in their magnetic coupling that is distinct to the growth method. Through structural and morphological studies, we confirm the link between the magnetic coupling and growth methods due to distinct levels of particle agglomeration at the very microscopic scale. Our studies reveal an inverse relationship between the strength of magnetic coupling and the degree of particle agglomeration in the nanocomposites. Our work presents a basic concept of controlling the particle agglomeration to tune magnetic coupling, relevant for designing advanced bi-magnetic nanocomposites for novel applications.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2019. Vol. 11, no 30, p. 14256-14265
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-394637DOI: 10.1039/c9nr05364fISI: 000484234700021PubMedID: 31318002OAI: oai:DiVA.org:uu-394637DiVA, id: diva2:1362050
Funder
Swedish Research Council, 2017-05030Swedish Research Council, 188-0179Carl Tryggers foundation , KF 17:18Available from: 2019-10-17 Created: 2019-10-17 Last updated: 2019-10-17Bibliographically approved

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