Induced Magnetic Ordering by Proton Irradiation in Graphite
P. Esquinazi, D. Spemann, R. H\"ohne, A. Setzer, K.-H. Han, T. Butz
TL;DR
Proton irradiation induces stable ferromagnetic or ferrimagnetic order in graphite at room temperature, as evidenced by SQUID and MFM measurements, revealing a new method to magnetize carbon-based materials.
Contribution
This study demonstrates that proton irradiation can induce stable magnetic ordering in graphite, a novel approach to magnetizing carbon materials.
Findings
Proton irradiation triggers ferromagnetism in graphite.
Magnetic order remains stable at room temperature.
Magnetic properties confirmed by SQUID and MFM measurements.
Abstract
We provide evidence that proton irradiation of energy 2.25 MeV on highly-oriented pyrolytic graphite samples triggers ferro- or ferrimagnetism. Measurements performed with a superconducting quantum interferometer device (SQUID) and magnetic force microscopy (MFM) reveal that the magnetic ordering is stable at room temperature.
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