Magnetic Properties of Fe/Ho Multilayers Prepared by Electron-Beam Evaporation

Geng, Kuiwei; Zeng, Fei; Gu, Yu; Song, Cheng; Wei, Xiaoxue; Pan, Feng

doi:10.1143/jpsj.75.084701

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…Figure 3 On the other hand, Fe K-edge XANES spectra from bcc Fe film and CoFeB films on W and Cu are shown in figure 3(c). In contrast to bcc Fe, where the peak labeled D is at E − E 0-Co ≈ 30 eV (E 0-Fe = 7112 eV), which is the characteristic of bcc Fe [19], it is profoundly overlapped by [20], such a variation of the XANES spectra is due to the formation of amorphous Fe. Compared with the case of W buffer, the Fe K-edge XANES spectrum of CoFeB on Cu buffer exhibits a relatively higher similarity in the position, shape and amplitude of oscillations to bcc Fe.…”

Section: Resultsmentioning

confidence: 95%

Tuning of uniaxial magnetic anisotropy in amorphous CoFeB films

Cui¹,

Song²,

Wang³

et al. 2013

J. Phys.: Condens. Matter

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We demonstrate that the uniaxial magnetic anisotropy (UMA) of amorphous CoFeB films can be tuned by crystallinity and orbital moment ratio, combining the results of magnetization reversal and ferromagnetic resonance with high-resolution transmission electron microscopy, x-ray-absorption near-edge structure and x-ray magnetic circular dichroism. Isotropic polycrystalline buffers of tungsten (W), tantalum (Ta), and copper (Cu) between CoFeB and Si(100) substrates have direct and crucial bearing on the interfacial microstructure and orbital moment ratio. Compared with Ta and Cu buffer, CoFeB with W buffer exhibits obvious UMA and has lower crystallinity at the interface and higher orbital moment. Amorphous phase distributed homogeneously in CoFeB film grown on W buffer contributes to improve the easy-axis squareness with a sharp magnetization reversal. Our demonstrations not only realize effective tuning of UMA in amorphous CoFeB, but also provide an appealing alternative buffer (W) for CoFeB-based magnetic tunnel junctions.

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Section: Resultsmentioning

confidence: 95%