Understanding particle size and distance driven competition of interparticle interactions and effective single-particle anisotropy

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00460558" target="_blank" >RIV/68378271:_____/16:00460558 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/16:10331103
Result on the web
<a href="http://dx.doi.org/10.1088/0953-8984/28/20/206004" target="_blank" >http://dx.doi.org/10.1088/0953-8984/28/20/206004</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/0953-8984/28/20/206004" target="_blank" >10.1088/0953-8984/28/20/206004</a>

Result language
angličtina
Original language name
Understanding particle size and distance driven competition of interparticle interactions and effective single-particle anisotropy
Original language description
Magnetic response of single-domain nanoparticles (NPs) in concentrated systems is strongly affected by mutual interparticle interactions. However, particle proximity significantly influences the single-particle effective anisotropy. To solve which of these two phenomena plays a dominant role in the magnetic response of real NP systems, systematic study on the samples with well-defined parameters is required. In our work, we prepared a series of nanocomposites constituted of highly- crystalline and well-isolated CoFe2O4 NPs embedded in an amorphous SiO2 matrix using a single-molecule precursor method. This preparation method enabled us to reach a wide interval of particle size and concentration. We observed that the characteristic parameters of the single-domain state (coercivity, blocking temperature) and dipole-dipole interaction energy (Ed-d) were proportional with each other. Our results are in excellent agreement with the Monte-Carlo simulations of particle growth. Therefore, the concept of modified NP effective anisotropy explains the magnetic response of our concentrated NP systems better than the concept of an energy barrier influenced by nterparticle interactions.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
<a href="/en/project/GA15-01953S" target="_blank" >GA15-01953S: Nanocomposite systems of plasmonic/magnetic nanoparticles-graphene-aromatic molecules for enhanced Raman scattering processes</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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