Spin transport in a lateral spin-injection device with an FM/Si/FM junction

Abstract The spin injection and detection have been investigated in a lateral spin-injection device with an FeCo/Si/FeCo junction structure. Magnetoresistance (MR) signals were found to appear at low magnetic fields in the range 4– 300 K , revealing that the spin-polarized electrons are injected from the first contact and, after propagating through the bulk Si, are collected by the second contact. The inverse MR was found to be independent of temperature. Our results demonstrate spin-polarized current injection and detection in the FM/Si/FM structure at room temperature.