Magnetic evaluation of Q-carbon thin films grown on a large scale
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
Authors
- Tatyana I. Smirnova (ORCID: https://orcid.org/0000-0001-7867-7116)
- Naveen Joshi (ORCID: https://orcid.org/0000-0002-1371-3291)
- Alex I. Smirnov (ORCID: https://orcid.org/0000-0002-0037-2555)
- Sachin Kadian (ORCID: https://orcid.org/0000-0002-2804-1109)
- Kishan Kumawat (ORCID: https://orcid.org/0000-0003-2076-8431)
- Roger Narayan (ORCID: https://orcid.org/0000-0002-9976-2982)
- Pranay Bhaskar Kalakonda
- J. T. Prater
Institutions
- University of North Carolina at Chapel Hill (US)
- North Carolina State University (US)
Publication Details
- Journal
- MRS Communications
- Published
- 2025-09-02
- DOI
- https://doi.org/10.1557/s43579-025-00806-w
- Citations
- 1
- Primary Topic
- Diamond and Carbon-based Materials Research
- Type
- article
- Field-Weighted Citation Impact
- 0.52
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
- Division of Electrical, Communications and Cyber Systems
- Division of Chemistry
- Defense Sciences Office, DARPA