Tunnel Magnetoresistance Over 100% in MgO-Based Magnetic Tunnel Junction Films With Perpendicular Magnetic L1$_{0}$-FePt Electrodes

Interface Magnetic Anisotropy of Pd/Co₂Fe<i>_x</i>Mn_1−<i>x</i>Si/MgO Layered Structures

“…Various kinds of thin lms with perpendicular magnetic anisotropy (PMA) have been studied for magnetic tunnel junctions (MTJs); e.g. CoPt, FePt, MnGa, Mn 3 Ge ordered alloys [3][4][5][6] , rare-earth transition metal alloys 7) , Co-Pt(Pd) superlattices [8][9][10] , and ultra-thin-lms with interfacial anisotropies 11,12) . Recent progress as shown in Refs.…”

Correlation between Pd metal thickness and thermally stable perpendicular magnetic anisotropy features in [Co/Pd]n multilayers at annealing temperatures up to 500 °C

“…3 A variety of PMA systems including an L1 0 alloy, multilayers (MLs), and rare earth-transition metal (RE-TM) alloys have been extensively employed to yield outstanding PMA performance. [5][6][7][8] Among them, artificial ML matrices composed of ferromagnetic and noble metals, such as Co/Pd, Co/Pt, Fe/Pd, and Fe/Pt, have shown that ML matrices are promising candidates for use in p-MTJs. 4,[9][10][11][12] Alternating two ultra-thin layers with different thicknesses in the ML matrix permits appreciable tuning of magnetic characteristics and yields strong PMA features.…”

Buffer layer dependence of magnetoresistance effects in Co2Fe0.4Mn0.6Si/MgO/Co50Fe50 tunnel junctions

“…12 The most famous p-MTJ has been established successfully with a CoFeB/MgO/CoFeB structure. 13 In addition, a substantial amount of materials have already been studied for the electrodes of p-MTJs, such as L1 0 -FePt 14 [21][22][23][24][25][26] Our group have been focusing on a sort of Co-based full-Heusler alloys, Co 2 (Fe-Mn)Si, for studying PMA and TMR effect. The chemical composition ratio and buffer layer dependence of PMA was investigated systematically in our previous work, [24][25][26] in which it was reported that the thickness of magnetic dead layer of Co 2 (Fe-Mn)Si depends on the buffer layer materials and annealing temperatures, and this was considered to originate from the differences in lattice mismatch and interdiffusion between the buffer layer material and the Co 2 (Fe-Mn)Si layer.…”