10:15 AM - 10:30 AM
▲ [18a-D104-5] CoFeB/MgAl2O4/CoFeB magnetic tunnel junctions with a large magnetoresistance over 240% at room temperature
Keywords:magnetic tunnel junction, tunnel magnetoresistance
Recently large tunnel magnetoresistance (TMR) ratios exceeding 300% have been reported in epitaxial MgAl2O4 spinel-based (Mg-Al-O) magnetic tunnel junctions (MTJs). However, polycrystalline Mg-Al-O MTJs failed to show a large TMR ratio due to the difficulty to obtain crystalline Mg-Al-O on CoFeB. In this study, we demonstrated a large TMR ratio over 240% through the achievement of a highly-(001) textured CoFeB/Mg-Al-O/CoFeB structure.