Year: 2025
Type: article
Abstract: Herein, we report detailed magnetic characteristics of 10-nm thick Q-carbon films grown over a large area. Following the Bloch spin wave theory, we show that Q-carbon exhibits robust room-temperature ferromagnetism with a surprisingly high Curie temperature of ~ 556 K. The square-root dependence of coercivity on temperature indicates homogeneous magnetic interactions in the sample. Finally, through ferromagnetic resonance spectroscopy measurements, we show that the spin interactions in Q-carbon are strong and intrinsic to the system. We envisage that the intrinsic ferromagnetism in Q-carbon opens a new frontier for carbon-based systems in spintronic devices. Graphical abstract
Source: MRS Communications
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,390
Funders: National Science Foundation, North Carolina Biotechnology Center, North Carolina State University, Novo Nordisk Fonden, National Institutes of Health, Defense Advanced Research Projects Agency, Advanced Research Projects Agency, National Center for Research Resources, Division of Electrical, Communications and Cyber Systems, Division of Chemistry, Defense Sciences Office, DARPA
Awards: G1099382903, G1201278958, CRIF:MU Acquisition of Cyber-Enabled X/Q-band CW EPR Spectrometer for Use in Research and Education, G1628498378, NNCI: North Carolina Research Triangle Nanotechnology Network (RTNN), G1676019983, G3275407028, G3338404878, G3797380979, NNCI: North Carolina Research Triangle Nanotechnology Network (RTNN), Time-domain/ELDOR EPR Spectrometer, G5297575652, G5815932797, G5912404510, G5973914729, G6810723037, Use of Diamond-Like Carbon Coatings to Reduce Leachables From Biomedical Metal Alloys and Polymeric Materials, Designing Ultra-hard Coatings of Q-carbon and Diamond Related Materials, G7994145037, G8392389417, G8657803787
OpenAlex ID: W4413920920