Evidence of interface exchange magnetism in self-assembled cobalt-fullerene nanocomposites exposed to air

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F17%3A00477480" target="_blank" >RIV/61389005:_____/17:00477480 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/17:00477480

Result on the web

<a href="http://dx.doi.org/10.1088/1361-6528/aa5d73" target="_blank" >http://dx.doi.org/10.1088/1361-6528/aa5d73</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6528/aa5d73" target="_blank" >10.1088/1361-6528/aa5d73</a>

Result language

angličtina

Original language name

Evidence of interface exchange magnetism in self-assembled cobalt-fullerene nanocomposites exposed to air

Original language description

We report on the establishing of an exclusive magnetic effect in. air-exposed CoxC60 nanocomposites (x > 2) created through self-assembling in the depositing mixture. In order to verify the influence of ambient air on the CoxC60 mixture film, we have studied in detail. the film magnetization at rather low temperatures, which provides their ferromagnetic behavior. Tracing the possible exchange bias effect, we distinguished a clear. vertical shift of the hysteresis loops recorded for the air-exposed CoxC60 films in the field cooling (FC) regime. The detected vertical shift of the FC loops is caused by an uncompensated magnetic moment M-u induced by exchange coupling of the Co spins at the Co/CoO interface. This interface arises due to the oxidation of small Co clusters distributed in a C-60-based matrix of self-assembled composite films, which occurs during air exposure. The core-shell structure of the Co/CoO magnetic clusters (about 2-3 nm in size) consisting of a epsilon-Co core and fcc-CoO shell was confirmed by means of transmission electron microscopy. Established interface magnetism testifies to a composite nanostructure in the CoxC60 mixture film with x > 2 and explains the influence of. air exposure on the film structure. The discovered magnetic effect implies a new application potential for cobalt-fullerene composites in sensors and catalysis.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

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

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Nanotechnology

ISSN

0957-4484

e-ISSN

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Volume of the periodical

28

Issue of the periodical within the volume

12

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

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UT code for WoS article

000408177500002

EID of the result in the Scopus database

2-s2.0-85014251713