Determination of the hyperfine magnetic field in magnetic carbonbased materials: DFT calculations and NMR experiments

Freitas, Jair C. C. and Scopel, Wanderla and Paz, Wendel S. and Bernardes, Leandro V. and Cunha-Filho, Francisco E. and Speglich, Carlos and Araújo-Moreira, Fernando M. and Pelc, Damjan and Cvitanić, Tonči and Požek, Miroslav (2015) Determination of the hyperfine magnetic field in magnetic carbonbased materials: DFT calculations and NMR experiments. Scientific Reports, 5. pp. 14761-10. ISSN 2045-2322

[img]
Preview
PDF - Published Version
Available under License Creative Commons Attribution.
Language: English

Download (815kB) | Preview

Abstract

The prospect of carbon-based magnetic materials is of immense fundamental and practical importance, and information on atomic-scale features is required for a better understanding of the mechanisms leading to carbon magnetism. Here we report the first direct detection of the microscopic magnetic field produced at 13C nuclei in a ferromagnetic carbon material by zero-field nuclear magnetic resonance (NMR). Electronic structure calculations carried out in nanosized model systems with different classes of structural defects show a similar range of magnetic field values (18–21 T) for all investigated systems, in agreement with the NMR experiments. Our results are strong evidence of the intrinsic nature of defect-induced magnetism in magnetic carbons and establish the magnitude of the hyperfine magnetic field created in the neighbourhood of the defects that lead to magnetic order in these materials.

Item Type: Article
Keywords: carbon; ferromagnetism; hyperfine field; NMR
Date: 5 October 2015
Subjects: NATURAL SCIENCES > Physics
Additional Information: This work is licensed under a Creative Commons Attribution 4.0 International License, http://creativecommons.org/licenses/by/4.0/. received: 18 February 2015; accepted: 03 September 2015; Published: 05 October 2015.
Divisions: Faculty of Science > Department of Physics
Project code: IP-11-2013-2729
Publisher: Nature Publishing Group
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 14 Mar 2017 19:48
Last Modified: 02 Dec 2017 17:41
URI: http://digre.pmf.unizg.hr/id/eprint/5452

Actions (login required)

View Item View Item