Physics – Condensed Matter – Materials Science
Scientific paper
2007-09-17
Applied Physics Letters 91, 173120 (2007)
Physics
Condensed Matter
Materials Science
Scientific paper
10.1063/1.2800810
A simple, reliable method for preparation of bulk Cr tips for Scanning Tunneling Microscopy (STM) is proposed and its potentialities in performing high-quality and high-resolution STM and Spin Polarized-STM (SP-STM) are investigated. Cr tips show atomic resolution on ordered surfaces. Contrary to what happens with conventional W tips, rest atoms of the Si(111)-7x7 reconstruction can be routinely observed, probably due to a different electronic structure of the tip apex. SP-STM measurements of the Cr(001) surface showing magnetic contrast are reported. Our results reveal that the peculiar properties of these tips can be suited in a number of STM experimental situations.
Bassi Andrea Li
Biagioni Paolo
Bottani Carlo E.
Brambilla A.
Casari Carlo S.
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