10:00 〜 10:15
▼ [14a-501-5] Magnetic tunnel junctions with a Li-substituted MgAl2O4 barrier
キーワード：MTJ, spinel, TMR
In this study, the occurence of coherent tunneling in a magnetic tunnel junction with a Li-substituted MgAl2O4 (LixMg1-2xAl2+xO4) barrier and Fe electrodes is shown. We choose Li as a substitution element in MgAl2O4 because it is the lightest alkali metal in the periodic table and it is able to form stable spinel oxides due to its small ionic radius (i.e. Li0.5Al2.5O5).
The XRD analysis confirmed an epitaxial growth with (001) orientation for both the bottom- and top- Fe electrodes, revealing an epitaxial growth of the Li-substituted MgAl2O4 barrier. Local minima in the differential conductance spectra and a weak temperature dependence of the resistance in the parallel magnetization state suggest the existence of coherent tunneling in the devices.
The XRD analysis confirmed an epitaxial growth with (001) orientation for both the bottom- and top- Fe electrodes, revealing an epitaxial growth of the Li-substituted MgAl2O4 barrier. Local minima in the differential conductance spectra and a weak temperature dependence of the resistance in the parallel magnetization state suggest the existence of coherent tunneling in the devices.