It is shown that electron tunneling in mechanically contacted high-speed submicron junction occurs in the presence of tens of kilobars of local stress. The observations are made under highly controlled conditions. Sharp tunneling resonances originating from a band-structure effect related to Ni ferromagnetism are observed and their stress and magnetic shifts studied.

• Received 4 June 1979

DOI:https://doi.org/10.1103/PhysRevLett.43.785