The spin-dependent conductance and magnetoresistance (MR) in ferromagnetic double junctions are studied theoretically, taking into account discrete energy levels and a finite spin relaxation time. The basic results are applied to hybrid tunnel junctions, in which nano-scale grains are embedded in the tunnel barrier. With increasing size quantization and spin relaxation time the MR is found to be enhanced at low temperatures.
|Number of pages||5|
|Publication status||Published - 1999 Sept 10|
|Event||Proceedings of the 1998 International Symposium on Surface and Interface: Properties of Different Symmetry Crossing 98 (ISSI PDSC-98) - Tokyo, Jpn|
Duration: 1998 Nov 19 → 1998 Nov 21