Defect-induced magnetism in graphite through neutron irradiation
arXiv:1410.1308 · doi:10.1103/PhysRevB.90.214435
Abstract
We have investigated the variation in the magnetization of highly ordered pyrolytic graphite (HOPG) after neutron irradiation, which introduces defects in the bulk sample and consequently gives rise to a large magnetic signal. We observe strong paramagnetism in HOPG, increasing with the neutron fluence. We correlate the induced paramagnetism with structural defects by comparison with density-functional theory calculations. In addition to the in-plane vacancies, the trans-planar defects also contribute to the magnetization. The lack of any magnetic order between the local moments is possibly due to the absence of hydrogen/nitrogen chemisorption, or the magnetic order cannot be established at all in the bulk form.
10 pages, 8 figures
References in corpus (14)
- Magnetism in Graphene Induced by Single-Atom Defects
- Induced Magnetic Ordering by Proton Irradiation in Graphite
- Room-temperature ferromagnetism in graphite driven by 2D networks of point defects
- Magnetism in Disordered Graphene and Irradiated Graphite
- Limits on intrinsic magnetism in graphene
- -Electron Ferromagnetism in Metal Free Carbon Probed by Soft X-Ray Dichroism
- Origin of magnetic moments in defective TiO2 single crystals
- Experimental Evidence for Two-Dimensional Magnetic Order in Proton Bombarded Graphite
- Efficient and accurate three dimensional Poisson solver for surface problems
- Rise and fall of defect induced ferromagnetism in SiC single crystals
- Revisiting the domain model for lithium intercalated graphite
- Tunable magnetic states in h-BN sheets
- Comment on: "Revealing common artifacts due to ferromagnetic inclusions in highly oriented pyrolytic graphite", by M. Sepioni, R.R. Nair, I.-Ling Tsai, A.K. Geim and I.V. Grigorieva, EPL 97 (2012) 47001
- Reply to Comment by D. Spemann et al [EPL 98 (2012) 57006, arXiv:1204.2992]