Emerging magnetic order in platinum atomic contacts and chains

Florian Strigl, Christopher Espy, Maximilian Bückle, Elke Scheer () and Torsten Pietsch
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Florian Strigl: University of Konstanz, Universitätsstraße 10
Christopher Espy: University of Konstanz, Universitätsstraße 10
Maximilian Bückle: University of Konstanz, Universitätsstraße 10
Elke Scheer: University of Konstanz, Universitätsstraße 10
Torsten Pietsch: University of Konstanz, Universitätsstraße 10

Nature Communications, 2015, vol. 6, issue 1, 1-9

Abstract: Abstract The development of atomic-scale structures revealing novel transport phenomena is a major goal of nanotechnology. Examples include chains of atoms that form while stretching a transition metal contact or the predicted formation of magnetic order in these chains, the existence of which is still debated. Here we report an experimental study of the magneto-conductance (MC) and anisotropic MC with atomic-size contacts and mono-atomic chains of the nonmagnetic metal platinum. We find a pronounced and diverse MC behaviour, the amplitude and functional dependence change when stretching the contact by subatomic distances. These findings can be interpreted as a signature of local magnetic order in the chain, which may be of particular importance for the application of atomic-sized contacts in spintronic devices of the smallest possible size.

Date: 2015
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DOI: 10.1038/ncomms7172

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