Magnetic Tunnel Transistor With Epitaxial Spin Valve Base

A magnetic tunnel transistor (MTT) with a full epitaxial Co
₆₆
Fe
₃₄
/Au/Co
₆₆
Fe
₃₄
spin valve base, grown on GaAs, is presented. The layer structure of the system is analyzed by TEM, XPS, and STM. For a bias voltage of 1.1 V, the MTT shows a magneto current ratio of 85% and a transfer ratio of 1.5middot10
^-6
. We ascribe these low values to the, although epitaxial, rough structure of the sample