Effect of MgO/Co interface and Co/MgO interface on the spin dependent transport in perpendicular Co/Pt multilayers

Abstract

Analysis of oxygen induced anisotropy crossover in Pt / Co / M Ox trilayers J. Appl. Phys.Effect of the metal/oxide interface on spin-dependent transport properties in perpendicular [Co/Pt] 3 multilayers was investigated. The saturation Hall resistivity (q xy ) is significantly increased by 45% with 1.4 nm thick CoO layer inserted at the top Co/MgO interface; whereas it is increased only 25% with 1 nm thick CoO layer at the bottom MgO/Co interface. The interfacial structures characterized by X-ray photoelectron spectroscopy show that the MgO/Co interface and Co/MgO interface including chemical states play a dominant role on spin-dependent transport, leading to different anomalous Hall behavior. V C 2014 AIP Publishing LLC.

Ru Catalyst-Induced Perpendicular Magnetic Anisotropy in MgO/CoFeB/Ta/MgO Multilayered Films

“…The ferromagnetic layer at the bottom is unavoidably oxidized during deposition of the oxide capping layer. However, CoO and FeO were not detected at the MgO/CoFeB interface, which we have investigated in our previous research . The XPS data for MgO (5 nm)/Co (0.6 nm)/Pt (3 nm) contained no trace of CoO at the MgO/Co bottom interface.…”

“…However, CoO and FeO were not detected at the MgO/ CoFeB interface, which we have investigated in our previous research. 34 The XPS data for MgO (5 nm)/Co (0. Ta interface also makes an important contribution to the PMA.…”

Size-dependent electrical transport properties in Co nanocluster-assembled granular films

“…This was because, as mentioned above, the atom distribution disorder at surface and interface increased with the decrease of Co cluster sizes. It is well known that the AHE was closely related to spin-orbit scattering of conduction electrons at disorder sites in ferromagnet 29 , 30 . In the Co nanocluster-assembled films, the amount of surface and interface increased with decreasing Co cluster sizes.…”

Oxygen atom diffusion-driven anomalous Hall behavior in Co/Pt multilayers

“…Ferromagnetic materials with AHE have recently attracted great interests because of potential applications in sensors, memories, and magnetic logic devices [8][9][10][11][12][13][14][15][16][17][18] in which large AHE is urgently needed. Numerous studies have been undertaken to enhance the AHE.…”