Size dependence of the surface spin disorder and surface anisotropy constant in ferrite nanoparticles

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F23%3A00575070" target="_blank" >RIV/61389013:_____/23:00575070 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/23:10467041 RIV/00216208:11320/23:10467041
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2023/NA/D3NA00266G" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2023/NA/D3NA00266G</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/D3NA00266G" target="_blank" >10.1039/D3NA00266G</a>

Result language
angličtina
Original language name
Size dependence of the surface spin disorder and surface anisotropy constant in ferrite nanoparticles
Original language description
The magnetic properties of nanoscale magnets are greatly influenced by surface anisotropy. So far, its quantification is based on the examination of the blocking temperature shift within a series of nanoparticles of varying sizes. In this scenario, the surface anisotropy is assumed to be a particle size-independent quantity. However, there is no solid experimental proof to support this simplified picture. On the contrary, our work unravels the size-dependent magnetic morphology and surface anisotropy in highly uniform magnetic nanoparticles using small-angle polarized neutron scattering. We observed that the surface anisotropy constant does not depend on the nanoparticle's size in the range of 3–9 nm. Furthermore, our results demonstrate that the surface spins are less prone to polarization with increasing nanoparticle size. Our study thus proves the size dependence of the surface spin disorder and the surface anisotropy constant in fine nanomagnets. These findings open new routes in materials based on a controlled surface spin disorder, which is essential for future applications of nanomagnets in biomedicine and magnonics.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10404 - Polymer science

Project
<a href="/en/project/LL2104" target="_blank" >LL2104: Nanoscale-to-atomic Engineering of acid site for selectivE heterogeneous Catalysis</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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