Magnetism at single isolated iron atoms implanted in graphite.
Phys Rev Lett
; 101(13): 137206, 2008 Sep 26.
Article
em En
| MEDLINE
| ID: mdl-18851491
ABSTRACT
Mössbauer spectra obtained after implantation of 57Fe into highly oriented pyrolytic graphite (HOPG) show a combined magnetic and quadrupole interaction with a magnetic hyperfine field Bhf = 32.6 T at 14 K. Though magnetic effects in nominally diamagnetic HOPG have been reported recently, no experiment has previously shown the existence of magnetism at the atomic scale. The results suggest that magnetic ordering occurs by coupling of the Fe magnetic moment to structural and/or electronic magnetic defects induced by the probe atoms' implantation damage.
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Ano de publicação:
2008
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Article