Matrix effects on the magnetic properties of γ- Fe2 O3 nanoparticles dispersed in a multiblock copolymer

Guskos, N; Glenis, S; Likodimos, V; Typek, J; Maryniak, M; Roslaniec, Z; Kwiatkowska, M; Baran, M; Szymczak, R; Petridis, D

dc.contributor.author	Guskos, N	en
dc.contributor.author	Glenis, S	en
dc.contributor.author	Likodimos, V	en
dc.contributor.author	Typek, J	en
dc.contributor.author	Maryniak, M	en
dc.contributor.author	Roslaniec, Z	en
dc.contributor.author	Kwiatkowska, M	en
dc.contributor.author	Baran, M	en
dc.contributor.author	Szymczak, R	en
dc.contributor.author	Petridis, D	en
dc.date.accessioned	2014-03-01T01:55:26Z
dc.date.available	2014-03-01T01:55:26Z
dc.date.issued	2006	en
dc.identifier.issn	00218979	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/27729
dc.subject.other	Copolymers	en
dc.subject.other	Magnetization	en
dc.subject.other	Molecular dynamics	en
dc.subject.other	Morphology	en
dc.subject.other	Nanostructured materials	en
dc.subject.other	Dispersion states	en
dc.subject.other	Ferromagnetic resonance (FMR)	en
dc.subject.other	Interparticle interactions	en
dc.subject.other	Matrix freezing	en
dc.subject.other	Ferrimagnetic materials	en
dc.title	Matrix effects on the magnetic properties of γ- Fe2 O3 nanoparticles dispersed in a multiblock copolymer	en
heal.type	journalArticle	en
heal.identifier.primary	10.1063/1.2189216	en
heal.identifier.secondary	http://dx.doi.org/10.1063/1.2189216	en
heal.identifier.secondary	084307	en
heal.publicationDate	2006	en
heal.abstract	The magnetic properties of γ- Fe2 O3 ferrimagnetic nanoparticles embedded in a multiblock poly(ether-ester) copolymer have been investigated by static magnetization and ferromagnetic resonance (FMR) measurements at two different dispersion states. Significant variation of the magnetic response is identified below T≈120 K, most pronounced in the marked resonance field shift of the FMR spectra, independently of the dispersion state of the nanocomposites. This behavior correlates favorably with the dynamic relaxation of the copolymer, indicating a matrix freezing effect that is attributed to the magnetoelastic coupling of the oxide nanoparticles with the surrounding polymer. At low temperatures, the dc magnetization and FMR measurements vary considerably for the two nanocomposites, indicating essential differences in their ground state, related to the different morphology of the samples and the concomitant variation of interparticle interactions. © 2006 American Institute of Physics.	en
heal.journalName	Journal of Applied Physics	en
dc.identifier.doi	10.1063/1.2189216	en
dc.identifier.volume	99	en
dc.identifier.issue	8	en