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Pregled bibliografske jedinice broj: 878970

NMR studies of intrinsic fields in ferromagnetic carbon


Požek, Miroslav; Pelc, Damjan; Marković, Igor; Cvitanić, Tonči; Freitas, J.C.C.; Scopel, W.L.; Paz, W.S.; Bernardes, L.V.; Cunha-Filho, F.E.; Speglich, C.; Araújo-Moreira, F.M.
NMR studies of intrinsic fields in ferromagnetic carbon // Third regional roundtable: Refractory, process industry, nanotechnologies and nanomedicine ROSOV PINN 2017 Programme and The Book of Abstracts / Jokanović, Vukoman (ur.).
Beograd: Vinča Institute of Nuclear Sciences, Belgrade, Serbia // Serbian Society for Nanotechnologies and Nanomedicine // Serbian Society for Refractory and Process Industry, 2017. str. 20-20 (plenarno, međunarodna recenzija, sažetak, znanstveni)


Naslov
NMR studies of intrinsic fields in ferromagnetic carbon

Autori
Požek, Miroslav ; Pelc, Damjan ; Marković, Igor ; Cvitanić, Tonči ; Freitas, J.C.C. ; Scopel, W.L. ; Paz, W.S. ; Bernardes, L.V. ; Cunha-Filho, F.E. ; Speglich, C. ; Araújo-Moreira, F.M.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Third regional roundtable: Refractory, process industry, nanotechnologies and nanomedicine ROSOV PINN 2017 Programme and The Book of Abstracts / Jokanović, Vukoman - Beograd : Vinča Institute of Nuclear Sciences, Belgrade, Serbia // Serbian Society for Nanotechnologies and Nanomedicine // Serbian Society for Refractory and Process Industry, 2017, 20-20

ISBN
978-86-921143-0-4

Skup
Third regional roundtable: Refractory, process industry, nanotechnologies and nanomedicine ROSOV PINN 2017

Mjesto i datum
Avala-Beograd, Srbija, 1.-2. 06. 2017

Vrsta sudjelovanja
Plenarno

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
NMR, graphite, ferromagnetism

Sažetak
The prospect of carbon-based ferromagnetic materials is extremely interesting from fundamental point of view, and promising for various applications. Recently, bulk ferromagnetic graphite was produced by intro- ducing high concentrations of defects into pristine graphite, providing the opportunity to investigate the microscopic origin of carbon ferromagnetism. Here we present an investigation of the intrinsic magnetic field in ferromagnetic carbon, studied by nuclear magnetic resonance (NMR) of the carbon nuclei. The nuclear resonant frequencies without external applied fields are a measure of the local intrinsic fields, giving direct insight into the magnetism of carbon-based materials. We find a clear 13C NMR signal in magnetic graphite, persisting up to temperatures above 200 K and with all the characteristics of ferromagnetic NMR, showing that the material is indeed intrinsically magnetic. We compare our results to quantitative DFT calculations of the microscopic field, showing that the magnetism originates in polarized point defects in the graphite structure. Finally, we discuss unconventional domain dynamics in ferromagnetic graphite uncovered by dynamical NMR measurements.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2013-11-2729 - Lokalna proba i mezoskopska dinamika u novim fazama jako koreliranih elektronskih sustava (Miroslav Požek, )

Ustanove
Prirodoslovno-matematički fakultet, Zagreb