Physics – Condensed Matter – Materials Science
Scientific paper
2005-12-12
Physics
Condensed Matter
Materials Science
accepted for publication in Nucl. Instr. and Meth
Scientific paper
10.1016/j.nimb.2006.04.014
Recently, magnetic order in highly oriented pyrolytic graphite (HOPG) induced by proton broad- and microbeam irradiation was discovered. Theoretical models propose that hydrogen could play a major role in the magnetism mechanism. We analysed the hydrogen distribution of pristine as well as irradiated HOPG samples, which were implanted to micrometer-sized spots as well as extended areas with various doses of 2.25 MeV protons at the Leipzig microprobe LIPSION. For this we used the sensitive 3D hydrogen microscopy system at the Munich microprobe SNAKE. The background hydrogen level in pristine HOPG is determined to be less than 0.3 at-ppm. About 4.8e15 H-atoms/cm^2 are observed in the near-surface region (4 um depth resolution). The depth profiles of the implants show hydrogen located within a confined peak at the end of range, in agreement with SRIM Monte Carlo simulations, and no evidence of diffusion broadening along the c-axis. At sample with microspots, up to 40 at-% of the implanted hydrogen is not detected, providing support for lateral hydrogen diffusion.
Bergmaier Andreas
Butz Tilman
Dollinger G.
Esquinazi Pablo
Greubel Constantin
No associations
LandOfFree
3D-Hydrogen Analysis of Ferromagnetic Microstructures in Proton Irradiated Graphite does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with 3D-Hydrogen Analysis of Ferromagnetic Microstructures in Proton Irradiated Graphite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 3D-Hydrogen Analysis of Ferromagnetic Microstructures in Proton Irradiated Graphite will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-502361