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Title: Magnetic anisotropy and superspin glass behaviour of Fe nanoparticles embedded in Cr and Ag matrices
Authors: Peddis, D.
Qureshi, M. T.
Baker, Stephen H.
Binns, Chris
Roy, Mervyn
Laureti, S.
Fiorani, D.
Nordblad, P.
Mathieu, R.
First Published: 27-Oct-2015
Publisher: Taylor & Francis (Routledge)
Citation: Philosophical Magazine, 2015, doi: 10.1080/14786435.2015.1090640
Abstract: Static and dynamical magnetic properties of Fe nanoparticles (NPs) embedded in non - magnetic (Ag) and antiferromagnetic (Cr) matrices with a volume filling fraction (VFF) of 10% have been investigated . In both Fe@Ag and Fe@Cr nanocomposites , the Fe nanoparticles have a narrow size distribution, with a mean particle diameter around 2 nm. In both samples , the saturation magnetization reaches that of Fe bulk bcc, suggesting the absence of alloying with the matrices. The coercivity at 5 K is much larger in Fe@Cr than in Fe@Ag as a result of the strong interaction between the Fe NPs and the Cr matrix. Temperature - dependent magnetization and ac - susceptibility measurements point out further evidence of the enhanced inter - particle interaction in the Fe@Cr system . While the behavior of Fe@Ag indicates the presence of weakly interacting magnetic monodomain particles with a wide distribution of blocking temperatures , Fe@Cr behaves like a superspin glass produced by the magnetic interaction between nanoparticles.
DOI Link: 10.1080/14786435.2015.1090640
ISSN: 0950-0839
eISSN: 1362-3036
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © Taylor & Francis. This is an Accepted Manuscript of an article published by Taylor & Francis in Philosophical Magazine Letters on 27 October 2015, available online: doi: 10.1080/14786435.2015.1090640.
Description: The file associated with this record is under a 12-month embargo from publication in accordance with the publisher's self-archiving policy, available at The full text may be available in the publisher links provided above.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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