Temperature and field dependences of transverse relaxivity of Co-Zn ferrite nanoparticles coated with silica: the role of magnetic properties and different regimes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00541752" target="_blank" >RIV/68378271:_____/21:00541752 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11110/21:10427455 RIV/00216208:11320/21:10427455 RIV/00023001:_____/21:00080756

Výsledek na webu

<a href="https://doi.org/10.1016/j.matchemphys.2020.124178" target="_blank" >https://doi.org/10.1016/j.matchemphys.2020.124178</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchemphys.2020.124178" target="_blank" >10.1016/j.matchemphys.2020.124178</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature and field dependences of transverse relaxivity of Co-Zn ferrite nanoparticles coated with silica: the role of magnetic properties and different regimes

Popis výsledku v původním jazyce

The transverse relaxivity r2 depends on multiple factors, most importantly on magnetic properties and the size of the particles, including both the size of magnetic cores and the effective size of whole particles present as individual entities in the suspension. The current study probes the transverse relaxivity of ferrimagnetic CoxZnyFe3-x-yO4 nanoparticles whose behavior varies from the blocked state, across the superparamagnetic regime to the vicinity of the paramagnetic state, while other parameters, namely the size of the magnetic cores (≈10 nm), the size of whole colloidally stable particles, and their geometry (≈30 nm-sized clusters of crystallites uniformly coated with ≈12 nm thick silica shell) are kept the same. Importantly, the field and temperature dependences of transverse relaxivity are discussed in relation to relevant theoretical models, i.e., motional averaging and static dephasing regimes.

Název v anglickém jazyce

Temperature and field dependences of transverse relaxivity of Co-Zn ferrite nanoparticles coated with silica: the role of magnetic properties and different regimes

Popis výsledku anglicky

The transverse relaxivity r2 depends on multiple factors, most importantly on magnetic properties and the size of the particles, including both the size of magnetic cores and the effective size of whole particles present as individual entities in the suspension. The current study probes the transverse relaxivity of ferrimagnetic CoxZnyFe3-x-yO4 nanoparticles whose behavior varies from the blocked state, across the superparamagnetic regime to the vicinity of the paramagnetic state, while other parameters, namely the size of the magnetic cores (≈10 nm), the size of whole colloidally stable particles, and their geometry (≈30 nm-sized clusters of crystallites uniformly coated with ≈12 nm thick silica shell) are kept the same. Importantly, the field and temperature dependences of transverse relaxivity are discussed in relation to relevant theoretical models, i.e., motional averaging and static dephasing regimes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Chemistry and Physics

ISSN

0254-0584

e-ISSN

1879-3312

Svazek periodika

260

Číslo periodika v rámci svazku

Feb

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

124178

Kód UT WoS článku

000620393200004

EID výsledku v databázi Scopus

2-s2.0-85098844542