Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/103379
Title: Static magnetic response of multicore particles
Authors: Ivanov, A. O.
Ludwig, F.
Issue Date: 2020
Publisher: American Physical Society
Citation: Ivanov A. O. Static magnetic response of multicore particles / A. O. Ivanov, F. Ludwig. — DOI 10.1103/PhysRevE.102.032603 // Physical Review E. — 2020. — Vol. 102. — Iss. 3. — 032603.
Abstract: We present theoretical calculations of the characteristics of the static magnetic response of multicore magnetic nanoparticles. These particles contain a considerable number (∼102) of single-domain magnetic nanocrystallites, which are modeled as uniformly magnetized balls with uniaxial magnetocrystalline anisotropy, the energetic barrier of which is comparable with the thermal energy. Thus, we model a multicore magnetic nanoparticle as an ensemble of superparamagnetic nanoparticles, the position and the easy magnetization axis of which are fixed but randomly distributed. Summing up the magnetic moments of the nanocrystallites inside a multicore particle, we thus obtain the magnetic moment of the multicore particle under the assumption that magnetic interactions between the nanocrystallites can be neglected. It is found that the weak-field magnetic response of these multicore particles is independent of anisotropy constant. The model is compared with recent experimental data and good agreement is found. © 2020 American Physical Society.
Keywords: MAGNETIC MOMENTS
MAGNETIC NANOPARTICLES
MAGNETOCRYSTALLINE ANISOTROPY
NANOCRYSTALLITES
NANOCRYSTALS
ANISOTROPY CONSTANTS
ENERGETIC BARRIERS
MAGNETIC INTERACTIONS
MAGNETIC NANOCRYSTALLITES
MAGNETIZATION AXIS
RANDOMLY DISTRIBUTED
SUPERPARAMAGNETIC NANOPARTICLES
THEORETICAL CALCULATIONS
MAGNETIC BUBBLES
URI: http://hdl.handle.net/10995/103379
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85093911187
PURE ID: 14173640
ISSN: 24700045
DOI: 10.1103/PhysRevE.102.032603
metadata.dc.description.sponsorship: A.O.I. gratefully acknowledges research funding from the Ministry of Science and Higher Education of the Russian Federation (Contract No. 02.A03.21.006, Ural Mathematical Center Project No. 075-02-2020-1537/1).
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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