Scanning tunneling microscopy studies of the Fe3O4(001) surface using antiferromagnetic probes
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2003Citation:
Mariotto, G.; Ceballos, S. F.; Murphy, S.; Shvets, I. V., Scanning tunneling microscopy studies of the Fe3O4(001) surface using antiferromagnetic probes, Journal of Applied Physics, 93, 10, 2003, 7142-7144Download Item:
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Abstract:
We have studied the (001) surface of a Fe3O4 single crystal using low-energy electron diffraction (LEED), Auger electron spectroscopy (AES) and scanning tunneling microscopy (STM). The STM measurements were performed using a novel tip of antiferromagnetic MnNi alloy. Atomically resolved STM images provide evidence of a surface terminated at the octahedral plane, with rows of Fe cations running along the ?110? crystallographic axes. Two different kinds of Fe cations with a separation of 6 ? were imaged, while the periodicity between Fe cations of the same kind is about 12 ?. We propose an interpretation of the anomalous corrugation observed in terms of a spin polarized effect, resulting in magnetic contrast between Fe2+ and Fe3+ ions in octahedral coordination.
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Science Foundation Ireland (SFI)
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http://people.tcd.ie/ivchvetshttp://people.tcd.ie/mariotl
http://people.tcd.ie/shmurphy
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Journal of Applied Physics93
10
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