Abstract

Ferromagnetic electrodes with perpendicular magnetic anisotropy (PMA) have been extensively studied because of the outstanding performance in applications. [1] To obtain high tunneling magnetoresistance (TMR), researchers have put efforts to realize PMA with Co-based full-Heusler alloy films with MgO barrier. However, the lattice mismatch between MgO and full-Heusler alloy leads to a rapid TMR reduction. Recently, spinel MgAl 2 O 4 (MAO) is demonstrated to be an ideal candidate for coherent tunnel barrier materials due to the chemically stability, band structure and better lattice match with Heusler alloys. [2, 3] Therefore, it is necessary to study the PMA of Heusler alloys with MAO barrier.

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