I - V asymmetry and magnetoresistance in nickel nanoconstrictions

Research output: Contribution to journalArticle


Research units

  • CEA
  • University of Oxford
  • Trinity College Dublin


We present a joint experimental and theoretical study on the transport properties of nickel nanoconstrictions. The samples show highly non-linear and asymmetric I-V characteristics when the conductance is smaller than G 0 = 2e2/h, and huge magnetoresistance ratios exceeding 99.9%. We model a single point contact in a two-band tight-binding model as a 2 × 2 nickel chain connected to two semi-infinite nickel leads. The magnetoresistance is calculated by using a non-equilibrium Green's function technique.


Original languageEnglish
Pages (from-to)1571-1572
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Issue numberPart 2
Publication statusPublished - May 2004
MoE publication typeA1 Journal article-refereed

    Research areas

  • Ballistic magnetoresistance, Electron transport theory, Nickel nanocontact, Spin polarized transport

ID: 5352899