Nickel on Lead, Magnetically Dead or Alive?

Details Nickel on Lead, Magnetically Dead or Alive? Nickel on Lead, Magnetically Dead or Alive?

2008-09-03

arxiv.org/abs/0809.0715v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

Two atomic layers of Ni condensed onto Pb films behave, according to anomalous Hall effect measurements, as magnetic dead layers. However, the Ni lowers the superconducting T_{c} of the Pb film. This has lead to the conclusion that the Ni layers are still very weakly magnetic. In the present paper the electron dephasing due to the Ni has been measured by weak localization. The dephasing is smaller by a factor 100 than the pair-breaking. This proves that the T_{c}-reduction in the PbNi films is not due magnetic Ni moments.

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