Contrasting magnetism in dilute and supersaturated cobalt-fullerene mixture films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00448880" target="_blank" >RIV/68378271:_____/15:00448880 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/15:00448880 RIV/44555601:13440/15:43886733

Výsledek na webu

<a href="http://dx.doi.org/10.1088/0022-3727/48/33/335002" target="_blank" >http://dx.doi.org/10.1088/0022-3727/48/33/335002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0022-3727/48/33/335002" target="_blank" >10.1088/0022-3727/48/33/335002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Contrasting magnetism in dilute and supersaturated cobalt-fullerene mixture films

Popis výsledku v původním jazyce

We assert a critical change in the mixture's organization yielding either the composite nanostructure as array of the Co/CoO core-shell nanoparticles (NPs) in the C-60-based matrix at a high content of Co (a supersaturated mixture or SSM) or a coexistence of fcc-C-60 and CoaC(60) fulleride when the Co content x is lower than some critical value x(c) (an ultradilute mixture or UDM). Magnetization of the SSM composite exhibits a superparamagnetic effect caused by the small Co/CoO NPs. Similar magnetization of the UDM with x = 0.7 revealed a stable ferromagnetism and evidenced the formation of a magnetic Co2C60 fulleride. Phase composition in the UDM and SSM films was verified with the XRD and Raman spectra. The UDM and SSM films reveal great difference in content of the remaining oxygen which implies easy diffusion of O-2 molecules within the C-60-based phases and their splitting at the Co NP surface followed by formation of CoO shells. The results obtained indicate controlled access to

Název v anglickém jazyce

Contrasting magnetism in dilute and supersaturated cobalt-fullerene mixture films

Popis výsledku anglicky

We assert a critical change in the mixture's organization yielding either the composite nanostructure as array of the Co/CoO core-shell nanoparticles (NPs) in the C-60-based matrix at a high content of Co (a supersaturated mixture or SSM) or a coexistence of fcc-C-60 and CoaC(60) fulleride when the Co content x is lower than some critical value x(c) (an ultradilute mixture or UDM). Magnetization of the SSM composite exhibits a superparamagnetic effect caused by the small Co/CoO NPs. Similar magnetization of the UDM with x = 0.7 revealed a stable ferromagnetism and evidenced the formation of a magnetic Co2C60 fulleride. Phase composition in the UDM and SSM films was verified with the XRD and Raman spectra. The UDM and SSM films reveal great difference in content of the remaining oxygen which implies easy diffusion of O-2 molecules within the C-60-based phases and their splitting at the Co NP surface followed by formation of CoO shells. The results obtained indicate controlled access to

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

<a href="/cs/project/GBP108%2F12%2FG108" target="_blank" >GBP108/12/G108: Příprava, modifikace a charakterizace materiálů zářením</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Journal of Physics D-Applied Physics

ISSN

0022-3727

e-ISSN

—

Svazek periodika

48

Číslo periodika v rámci svazku

33

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000359276800003

EID výsledku v databázi Scopus

2-s2.0-84938844154