Pregled bibliografske jedinice broj: 878970
NMR studies of intrinsic fields in ferromagnetic carbon
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)
CROSBI ID: 878970 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
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
Beograd, Srbija, 01.06.2017. - 02.06.2017
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
Projekti:
HRZZ-IP-2013-11-2729 - Lokalna proba i mezoskopska dinamika u novim fazama jako koreliranih elektronskih sustava (LOMEDY) (Požek, Miroslav, HRZZ - 2013-11) ( CroRIS)
Ustanove:
Prirodoslovno-matematički fakultet, Zagreb
