Magnetic switching behaviors of orbital states with different magnetic quantum numbers in Au/Fe/MgO multilayer system

Spin/orbital and magnetic quantum number selective magnetization measurements for CoFeB/MgO multilayer films

“…However, the OSMH curves show a step-function-like behavior with rather small magnetization switching fields for the annealed CoFeB film (figure 3(b)), as-prepared CoFeB/MgO multilayer film (figure 3(c)), and annealed CoFeB/MgO multilayer film (figure 3(d)). The step-function-like behavior with rather small magnetization switching fields of OSMH curves has also been reported in the Au/Fe/MgO/Fe multilayer system [19]. Note that the OSMH curve of the as-prepared CoFeB film, which has isotropic amorphous or nano-crystalline structure, as observed in figures 1 and 2, does not show a step-function-like behavior.…”

“…The spin, orbital, and total magnetic moments of Co 50 Fe 50 have been reported to be 2.18, 0.13 and 2.31µ B [21]. Therefore, we assumed that the CoFeB layer possesses the same orbital-to-spin magnetic moment ratio at 2.5 T [18,19]. Because the total magnetization of the asprepared CoFeB film at 2.5 T was 1054 emu cm −3 as shown in figure 2(a), for example, the spin and orbital magnetizations were estimated to be 995 emu cm −3 and 59 emu cm −3 , respectively, if we assumed the same orbital-to-spin magnetic moment ratio as that of the Co 50 Fe 50 .…”

“…They pointed out that the PMA of the Fe/MgO MTJ film is attributed to the enhancement of contributions from orbital magnetization in coincidence with that from the |m| = 1 and 2 magnetic quantum number states. Suzuki et al also found the relation between the SSMH curves for the |m| = 2 magnetic quantum number states and OSMH curves for the Au/Fe/MgO multilayers from the viewpoint of PMA [19]. These results suggest that the magnetization switching behavior in PMA films is dominated by the OSMH curve for the |m| = 2 magnetic quantum number states.…”

The study of the magnetization process of fe film by magnetic Compton scattering and Mössbauer spectroscopy

“…We have developed a method for measuring spin moment selective magnetization (M) versus magnetizing field (H), to obtain spin-specific MH (SSMH) curve using the field dependence of MCP in combination with a conventional total magnetization curve measurement [6][7][8][9][10]. Moreover, building on this method, orbital moment specific MH (OSMH) curve and an element specific MH (ESMH) curve measurements have been successfully performed.…”

Identifying a descriptor for d-orbital delocalization in cathodes of Li batteries based on x-ray Compton scattering

“…The Compton technique has been widely employed for determining bulk electronic structures and Fermi surfaces of materials. [10][11][12][13][14][15][16][17][18][19][20][21][22][23] Here we discuss the application of the technique to polycrystalline LixCoO2 in order to gain insight into the nature of redox orbitals associated with Li intercalation. We also propose a descriptor based on Compton profile differences to monitor d-orbital delocalization in real space.…”