Influence of underlayers on the soft magnetic properties of Fe–Co–Al–O films

Hayashi, Naoto; Miyamoto, Yoshinari; Machida, Kenji; Tamaki, Toru

doi:10.1016/j.jmmm.2004.10.064

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…The reduced strain energy γ e is favorable to the layer-by-layer growth of the magnetic layer. During the growth process, the layer-by-layer growth is conducive to improving the degree of the orientation and to reducing the defects and/or internal stress; [27] hence, a smaller K grain is obtained. Apart from these, the different stacking structure ratios and crystallinity and atomic site ordering can also be linked drastically to K grain .…”

Section: Resultsmentioning

confidence: 99%

Effect of seed layers on the static and dynamic magnetic properties of CoIr films with negative effective magnetocrystalline anisotropy

Zhang

et al. 2023

Chinese Phys. B

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The c-axis oriented hcp-Co81Ir19 magnetic films were prepared on different seed layers (Ni, Cu, Ir, Pt, Au and No seed). It was systematically investigated that the factors of surface free energy and strain energy have impact on the orientation and defects and/or internal stress with increasing the lattice mismatches ratio. Moreover, the initial permeability and the natural resonance frequency were discussed in great detail by using the comparison between calculated values and experiment values. We have found that the almost unchanged 4πM s and μi are not affected, while the changed H c , intrinsic K grain and fr are strongly dependent on a seed layer and the seed layer material. Moreover, the extracted damping constant is sensitive to the defects and/or internal stress and the orientation of grains. Therefore, the soft magnetic properties and microwave properties are adjusted and optimized by the seed layers with different material.

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Section: Resultsmentioning

confidence: 99%

Effect of seed layers on the static and dynamic magnetic properties of CoIr films with negative effective magnetocrystalline anisotropy

Zhang

et al. 2023

Chinese Phys. B

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“…The reason is not quite clear, but according to Spenato et al [22], the anisotropy field should be the effective anisotropy field H i not the conventional anisotropy field H k due to so-called magnetization ripple in the films. "Magnetisation ripple" has been frequently used to explain the domain pattern and anisotropy of nanograin-matrix heterogeneous system such as CoFeHfO [23], FeCoAlO [24] films and multilayer systems such as FeCoSiN/Al 2 O 3 [25] and NiFe/Cooxides [26] films. Spenato et al [22] found that, in thin amorphous ferromagnetic films with induced in-plane anisotropy, the magnetic ripples are strongly frequency dependent at the frequency higher than 280 MHz.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and thickness dependent magnetic properties of nanogranular Co–Zn–O thin films for microwave applications

Liu

Ong

2011

Journal of Alloys and Compounds

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“…Except for the above methods, to deposit an underlayer is actually a very common and effective method for tuning the soft magnetic properties of sputtered thin films [10][11][12][13][14][15][16][17][18][19][20][21]. The improvements can be very obvious, especially on the thin films with large magnetostrictions, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…FeCo films [10][11][12][13][14]. With proper underlayers, some reports even find that for granular thin films [15,16,20] and laminated films [21], the soft magnetic properties can still be improved. For most normal metal underlayers, the improvements in the soft magnetic properties are attributed to the modification of the film's texture and the decrease in crystal sizes [10][11][12][13][14]20].…”

Section: Introductionmentioning

confidence: 99%

Influence of Cu underlayer on the high-frequency magnetic characteristics of as-sputtered FeCoSiN granular thin films

Xu¹,

Zhang²,

Ma³

et al. 2008

J. Phys. D: Appl. Phys.

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In this work, we investigate the influence of Cu underlayers on the magnetic properties of as-sputtered FeCoSiN thin films. Different from their traditional improvement in the static magnetic properties of sputtered films, Cu underlayers are found to have a significant influence on the dynamic magnetic properties of as-sputtered FeCoSiN thin film at high frequencies. The permeability spectra and the analyses based on the Landau–Lifshitz–Gilbert equation show that the damping coefficient in the magnetization dynamics significantly increases with the underlayer's thickness, and thus the resonant frequency linewidth increases. The extent of increase shows that using the Cu underlayer is an effective method for tuning the damping in the magnetization dynamics of granular thin films. The increase in the damping coefficient is suggested to be related to the release of the film's stress by the underlayer.

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Influence of underlayers on the soft magnetic properties of Fe–Co–Al–O films

Cited by 9 publications

References 9 publications

Effect of seed layers on the static and dynamic magnetic properties of CoIr films with negative effective magnetocrystalline anisotropy

Effect of seed layers on the static and dynamic magnetic properties of CoIr films with negative effective magnetocrystalline anisotropy

Microstructure and thickness dependent magnetic properties of nanogranular Co–Zn–O thin films for microwave applications

Influence of Cu underlayer on the high-frequency magnetic characteristics of as-sputtered FeCoSiN granular thin films

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