Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 38: Poster Session Transport
TT 38.12: Poster
Mittwoch, 16. März 2011, 14:00–18:00, P3
Magneto-resistance Measurements on Atomic Platinum Chains — •Christopher Espy, Florian Strigl, and Elke Scheer — Department of Physics, University of Konstanz, 78457 Konstanz, Germany
Recently there have been many theoretical predictions that platinum, nonmagnetic in bulk, is indeed magnetic in nanostructures [1][2]. How and when this magnetism manifests is still a point of discussion [3]. Preliminary experiments investigating magnetic effects in nanostructures of various metals have been performed, however conclusive evidence confirming previous theoretical predictions regarding magnetism in platinum nanostructures has yet to be found [4].
In this contribution we present the study of suspended monatomic platinum
nanowires, fabricated using the mechanically controllable break junction
technique.
Various experiments are carried out at low temperatures, T < 4.2 K, and under
cryogenic vacuum conditions, including the generation of conductance histograms,
magneto-resistance investigations, and study of the current-voltage
characteristics of the nanostructures.
We find strong chain length-dependent magneto-resistive effects of considerable
magnitude, up to 25%.
Smogunov et al. Nat. Nanotechnol. 3 (2008) 22
García-Suárez et al. Phys. Rev. B 79 (2009) 060408
Thiess et al. Phys. Rev. Lett. 103 (2009) 217201
Untiedt et al. Phys. Rev. B 69 (2004) 081401(R)