Effect of Ta Underlayer on Perpendicular Anisotropy of TbFeCo Films

Spin-orbit torques in Ta/TbxCo100-x ferrimagnetic alloy films with bulk perpendicular magnetic anisotropy

“…M s also depends on the presence of the underlayer and is larger for films grown directly on the thermally-oxidized substrate. Similar effects have been reported elsewhere 39 and attributed to preferential oxidation of the rare-earth metal by reduction of the substrate thermal oxide layer, which changes the surface roughness and alloy content. The anisotropy field l 0 H k and effective magnetic anisotropy energy density…”

“…31,32 Bulk PMA materials, such as L10-ordered alloys (FePt, FePd, CoPt, etc. ), [32][33][34][35] Heusler alloys, 36,37 and rare earth-transition metal (RE-TM) alloys, 14,[29][30][31][38][39][40][41][42][43][44] are potential candidates for devices since these materials provide a considerably larger volume anisotropy energy barrier. Furthermore, since the PMA of these materials is less sensitive to the nature of the interfaces, the adjacent layer materials can be optimized to maximize the SOTs without impacting the PMA.…”

Control of Compensation Temperature in CoGd Films through Hydrogen and Oxygen Migration under Gate Voltage

“…The increased peak energy could be attributed to the introduction of oxygen ions. It is noteworthy that the shift of photon energy for Gd- M 5 (1193.0 eV) is much larger than that for Co- L 3 (783.8 eV), as the electronegativity of Gd is smaller than that of Co. , The calculated positions of XAS peaks in the pure Co 2 Gd alloy and alloy with inserted H/O ions are consistent with the above experiment (Figure S12). Although Co is slightly oxidized, the amount or oxidation level of Co–O is too low to form a stable antiferromagnetic phase (Figure S13).…”

Spin Hall switching of the magnetization in Ta/TbFeCo structures with bulk perpendicular anisotropy

“…The as-deposited films demonstrate a strong intrinsic perpendicular anisotropy [27][28][29] as shown in Fig. 1(a).…”

“…The as-deposited films demonstrate a strong intrinsic perpendicular anisotropy [27][28][29] as shown in Fig. 1 We started by investigating the variation of the hysteresis loop while gradually changing the current, and the results are shown in Fig.…”