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Combined effect of demagnetizing field and induced magnetic anisotropy on the magnetic properties of manganesezinc ferrite composites

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dc.title Combined effect of demagnetizing field and induced magnetic anisotropy on the magnetic properties of manganesezinc ferrite composites en
dc.contributor.author Babayan, Vladimir Artur
dc.contributor.author Kazantseva, Natalia E.
dc.contributor.author Moučka, Robert
dc.contributor.author Sapurina, Irina Yu.
dc.contributor.author Spivak, Yu.M.
dc.contributor.author Moshnikov, Vyacheslav A.
dc.relation.ispartof Journal of Magnetism and Magnetic Materials
dc.identifier.issn 0304-8853 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2012
utb.relation.volume 324
utb.relation.issue 2
dc.citation.spage 161
dc.citation.epage 172
dc.type article
dc.language.iso en
dc.publisher Elsevier Science B.V. en
dc.identifier.doi 10.1016/j.jmmm.2011.08.002
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0304885311005385
dc.subject Coated particle en
dc.subject Conducting polymer en
dc.subject Dynamic magnetization process en
dc.subject Ferromagnetic material en
dc.subject Magnetic anisotropy en
dc.subject Magnetic permeability en
dc.subject MnZn ferrite en
dc.subject Polyaniline en
dc.description.abstract This work is devoted to the analysis of factors responsible for the high-frequency shift of the complex permeability (μ) dispersion region in polymer composites of manganesezinc (MnZn) ferrite, as well as to the increase in their thermomagnetic stability. The magnetic spectra of the ferrite and its composites with polyurethane (MnZnPU) and polyaniline (MnZnPANI) are measured in the frequency range from 1 MHz to 3 GHz in a longitudinal magnetization field of up to 700 and in the temperature interval from -20 ° to 150 °. The approximation of the magnetic spectra by a model, which takes into account the role of domain wall motion and magnetization rotation, allows one to determine the specific contribution of resonance processes associated with domain wall motion and the natural ferromagnetic resonance to the μ. It is established that, at high frequencies, the μ of the MnZn ferrite is determined solely by magnetization rotation, which occurs in the region of natural ferromagnetic resonance when the ferrite is in the single domain state. In the polymer composites of the MnZn ferrite, the high-frequency permeability is also determined mainly by the magnetization rotation; however, up to high values of magnetizing fields, there is a contribution of domain wall motion, thus the single domain state in ferrite is not reached. The frequency and temperature dependence of μ in polymer composites are governed by demagnetizing field and the induced magnetic anisotropy. The contribution of the induced magnetic anisotropy is crucial for MnZnPANI. It is attributed to the elastic stresses that arise due to the domain wall pinning by a polyaniline film adsorbed on the surface of the ferrite during in-situ polymerization. © 2011 Elsevier B.V. All rights reserved. en
utb.faculty Faculty of Technology
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1002589
utb.identifier.rivid RIV/70883521:28110/12:43865841!RIV13-MSM-28110___
utb.identifier.rivid RIV/70883521:28610/12:43865841!RIV13-MSM-28610___
utb.identifier.obdid 43865858
utb.identifier.scopus 2-s2.0-80052756211
utb.identifier.wok 000295466200010
utb.identifier.coden JMMMD
utb.source j-scopus
dc.date.accessioned 2012-02-10T13:15:08Z
dc.date.available 2012-02-10T13:15:08Z
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Babayan, Vladimir Artur
utb.contributor.internalauthor Kazantseva, Natalia E.
utb.contributor.internalauthor Moučka, Robert
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