Structural and magnetic properties of Mn(x)Co(1-x)Fe(2)O(4) ferrite nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F11%3A00372688" target="_blank" >RIV/61388980:_____/11:00372688 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jmmm.2010.09.049" target="_blank" >http://dx.doi.org/10.1016/j.jmmm.2010.09.049</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmmm.2010.09.049" target="_blank" >10.1016/j.jmmm.2010.09.049</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural and magnetic properties of Mn(x)Co(1-x)Fe(2)O(4) ferrite nanoparticles

Popis výsledku v původním jazyce

We report on the structural and magnetic properties of nanoparticles of Mn(x)Co(1-x)Fe(2)O(4) (x=0.1,0.5) ferrites produced by the glycothermal reaction. From the analysis of XRD spectra and TEM micrographs, particle sizes of the samples have been foundto be about 8 nm (for x=0.1) and 13 nm (for x=0.5). The samples were characterized by DC magnetization in the temperature range 5-380 K and in magnetic fields of up to 40 kOe using a SQUID magnetometer. Mossbauer spectroscopy results show that the samplewith higher Mn content has enhanced hyperfine fields after thermal annealing at 700 degrees C. There is a corresponding small reduction in hyperfine fields for the sample with lower Mn content. The variations of saturation magnetization, remnant magnetization and coercive fields as functions of temperature are also presented. Our results show evidence of superparamagnetic behaviour associated with the nanosized particles. Particle sizes appear to be critical in explaining the observed p

Název v anglickém jazyce

Structural and magnetic properties of Mn(x)Co(1-x)Fe(2)O(4) ferrite nanoparticles

Popis výsledku anglicky

We report on the structural and magnetic properties of nanoparticles of Mn(x)Co(1-x)Fe(2)O(4) (x=0.1,0.5) ferrites produced by the glycothermal reaction. From the analysis of XRD spectra and TEM micrographs, particle sizes of the samples have been foundto be about 8 nm (for x=0.1) and 13 nm (for x=0.5). The samples were characterized by DC magnetization in the temperature range 5-380 K and in magnetic fields of up to 40 kOe using a SQUID magnetometer. Mossbauer spectroscopy results show that the samplewith higher Mn content has enhanced hyperfine fields after thermal annealing at 700 degrees C. There is a corresponding small reduction in hyperfine fields for the sample with lower Mn content. The variations of saturation magnetization, remnant magnetization and coercive fields as functions of temperature are also presented. Our results show evidence of superparamagnetic behaviour associated with the nanosized particles. Particle sizes appear to be critical in explaining the observed p

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Journal of Magnetism and Magnetic Materials

ISSN

0304-8853

e-ISSN

—

Svazek periodika

323

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

4

Strana od-do

471-474

Kód UT WoS článku

000284626800018

EID výsledku v databázi Scopus

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