The internal structure of magnetic nanoparticles determines the magnetic response

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00476778" target="_blank" >RIV/68378271:_____/17:00476778 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/17:10362177 RIV/00216208:11320/17:10362177

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c6nr07262c" target="_blank" >http://dx.doi.org/10.1039/c6nr07262c</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c6nr07262c" target="_blank" >10.1039/c6nr07262c</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The internal structure of magnetic nanoparticles determines the magnetic response

Popis výsledku v původním jazyce

This work aims to emphasize that the magnetic response of single-domain magnetic nanoparticles (NPs) is driven by the NPs’ internal structure, and the NP size dependencies of magnetic properties are overestimated. The relationship between the degree of the NPs’ crystallinity and magnetic response is unambiguously demonstrated in eight samples of uniform maghemite/magnetite NPs and corroborated with the results obtained for about 20 samples of spinel ferrite NPs with different degrees of crystallinity. The NP samples were prepared by the thermal decomposition of an organic iron precursor subjected to varying reaction conditions, yielding variations in the NP size, shape and relative crystallinity. We characterized the samples by using several complementary methods. We evaluated the NPs’ relative crystallinity by comparing the NP sizes determined from TEM and PXRD and further inspecting the NPs’ internal structure and relative crystallinity by using HR-TEM. The results of the structural characterization were put in the context of the NPs’ magnetic response. Our results clearly demonstrate that the NP crystallinity level that is mirrored in the internal spin order drives the specific magnetic response of the single-domain NPs.

Název v anglickém jazyce

The internal structure of magnetic nanoparticles determines the magnetic response

Popis výsledku anglicky

This work aims to emphasize that the magnetic response of single-domain magnetic nanoparticles (NPs) is driven by the NPs’ internal structure, and the NP size dependencies of magnetic properties are overestimated. The relationship between the degree of the NPs’ crystallinity and magnetic response is unambiguously demonstrated in eight samples of uniform maghemite/magnetite NPs and corroborated with the results obtained for about 20 samples of spinel ferrite NPs with different degrees of crystallinity. The NP samples were prepared by the thermal decomposition of an organic iron precursor subjected to varying reaction conditions, yielding variations in the NP size, shape and relative crystallinity. We characterized the samples by using several complementary methods. We evaluated the NPs’ relative crystallinity by comparing the NP sizes determined from TEM and PXRD and further inspecting the NPs’ internal structure and relative crystallinity by using HR-TEM. The results of the structural characterization were put in the context of the NPs’ magnetic response. Our results clearly demonstrate that the NP crystallinity level that is mirrored in the internal spin order drives the specific magnetic response of the single-domain NPs.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

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

2017

Kód důvěrnosti údajů

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

Název periodika

Nanoscale

ISSN

2040-3364

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

5129-5140

Kód UT WoS článku

000399809400012

EID výsledku v databázi Scopus

2-s2.0-85018773193