From ballistic transport to tunneling in electromigrated ferromagnetic breakjunctions.

Research output: Contribution to journalJournal articleResearchpeer-review


  • Nl0522936

    Final published version, 169 KB, PDF document

We fabricate ferromagnetic nanowires with constrictions whose cross section can be reduced gradually from 100 x 30 nm(2) to the atomic scale and eventually to the tunneling regime by means of electromigration. The contacts are mechanically and thermally stable. We measure low-temperature magnetoresistances (MR) <3% for contacts <400 Omega, reproducible MR variations that are nonmonotonic in the regime 400 Omega - 25 kOmega, and a maximum MR of 80% for atomic-scale widths. These results for devices > 400 Omega differ from previous room-temperature studies of electrodeposited devices. For samples in the tunneling regime, we observe large fluctuations in MR, between -10 and 85%.
Original languageEnglish
JournalNano Letters
Issue number1
Pages (from-to)123-127
Number of pages5
Publication statusPublished - 1 Jan 2006

Number of downloads are based on statistics from Google Scholar and

No data available

ID: 44225683