2011/08/22 by Jonas Kausteklis, Kausteklis, Jonas, P. Cevc +13
Engineering · Materials Science · Physics and Astronomy · #Advancements in Battery Materials #Electron and X-Ray Spectroscopy Techniques #FOS: Physical sciences #Graphite, nuclear technology, radiation studies #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1108.4259
6 pages, 5 figures; accepted in Phys. Rev. B as regular article
arxiv created 2011/08/22 · openalex publication_date 2011/08/22 · arxiv updated 2011/08/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on a systematic temperature dependent X-band electron paramagnetic resonance (EPR) study of nano-sized graphite particles prepared by ball-milling. In as-prepared samples a very intense and sharp EPR resonance at g=2.0035 has been measured. The EPR linewidth shows a Korringa-like linear temperature dependence arising due to the coexistence and strong exchange coupling of itinerant and localized edge states. With a prolonged aging in inert atmosphere changes in the EPR signal suggest gradual structural reconstruction where the localized edge-states dominate the EPR signal. In this case the EPR spin susceptibility shows a maximum at ≈ 23 \rm K indicating the development of antiferromagnetic correlations as expected for the graphene lattice with a bipartite symmetry.