Title of article :
Study on spin dependent tunneling and Coulomb blockade in granular systems with restricted tunneling paths
Author/Authors :
Mitani، نويسنده , , S and Takanashi، نويسنده , , K and Yakushiji، نويسنده , , K and Chiba، نويسنده , , J and Fujimori، نويسنده , , H، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2001
Abstract :
We describe the microfabrication process of a granular nanobridge structure consisting of electrodes separated by a nanometer-sized gap in which a thin insulating Co–Al–O granular film is filled, and discuss the observed Coulomb blockade with a clear threshold voltage (Vth) and the enhanced tunnel magnetoresistance of about 30% at a voltage slightly above Vth. Recent results of our scanning tunneling microscopy studies to clarify the topographic features and single electron tunneling phenomena on the surface of Co–Al–O granular films are also presented.
Keywords :
Granular film , Coulomb blockade , Focused ion beam etching , Scanning tunneling microscopy , Tunnel magnetoresistance , single electron tunneling
Journal title :
MATERIALS SCIENCE & ENGINEERING: B
Journal title :
MATERIALS SCIENCE & ENGINEERING: B