Enhancement of resonance frequency of stripe domain soft magnetic film by oblique sputtering

Zhou, Chenglong; You, Menghan; Ding, Lei; Feng, Chun; Xu, Mingzhi; Wang, Shengxiang

doi:10.1007/s00339-019-2442-y

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…Many studies have already been performed on the static and high-frequency magnetic properties of SD by changing the thickness [16,17,19,22,27] or perpendicular magnetic anisotropy [18,[30][31][32][33]. However, the observed resonant peaks excited by the microwave for most experimental results [9,12,15,16,18,19,22,28,[34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] are weak, and the number of resonant peaks is less than four due to weak contributions from the less dominant regions. Regarding the studies on the exchange stiffness, they are usually achieved through the interlayer exchange coupling [49][50][51] and the studies mainly focus on the domain structure or static magnetic parameters of the SD films.…”

Section: Introductionmentioning

confidence: 99%

Magnetization enhanced the multiple magnetic domain-dominated resonance modes in stripe domain films

Chen

Wang

et al. 2023

New J. Phys.

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FeCoHf films with different Hf contents and thicknesses were deposited by composition-gradient sputtering. The results showed that the stripe domain structure emerges when the film thickness exceeds a critical thickness (220~330 nm), but the increase in introduced Hf leads to a decrease in magnetization, and in turn, the stripe phase weakens and eventually disappears. Dynamic measurements revealed magnetic domain-dependent resonant absorption spectra with up to seven resonance peaks, which have rarely been observed in magnetic film with an established stripe domain structure. The number of resonant peaks can be controlled by the saturation magnetization of the film. Micromagnetic simulations indicate that multiple magnetic domain resonance modes can be attributed to the enhanced magnetization, which induces an increase in the magnetic domain wall volume. These results emphasize the pivotal role of magnetic domain dynamics in the framework of spintronic and microwave devices.

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Section: Introductionmentioning

confidence: 99%

Magnetization enhanced the multiple magnetic domain-dominated resonance modes in stripe domain films

Chen

Wang

et al. 2023

New J. Phys.

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Fe@SiO2@(MnZn)Fe2O4 soft magnetic composites with enhanced permeability and low core loss for high-frequency applications

Chen

Gao

et al. 2019

Journal of Alloys and Compounds

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Influence of magentic annealing temperature on microstructure and magnetic properties of NiCu alloy film

Liu¹,

Gao²,

Feng³

et al. 2020

Acta Phys. Sin.

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In this paper, Ni88Cu12 thin films are prepared on Si substrates by radio-frequency magnetron co-sputtering. The effects of film thickness and heat treatment on domain structure and magnetic properties are studied. The Ni88Cu12 films with thickness less than 210 nm show weak in-plane anisotropy. After the vacuum magnetic field heat treatment, the crystal grains of all films grow, and the in-plane anisotropy extents of Ni88Cu12 films with thickness less than 210 nm become weaker. The films have different morphological characteristics at different heat treatment temperatures. The surface of the film is very dense before heat treatment. After heat treatment at 300 °C, it forms island shape due to the solid solution between the grains. Compared with the grains on the surface of the heat-treated film at 300 °C, the grains grow further after being heat-treated at 400 °C. Grown grains cover the gaps between the grains, which makes the film surface flat. The results of in-plane normalized hysteresis loop of the films show that the critical thickness of the stripe domains decreases after heat treatment. The stripe domain structure appears in the 210-nm-thick films without being heat-treated. For the film with the heat treatment, its remanence ratio Mr/Ms decreases, and the saturation field Hs increases, and thus leading the perpendicular anisotropy constant Kp to increase. Therefore, the thickness of the stripe domain in the film after being heat-treated decreases. Compared with the films after being heat-treated, the 105-nm-thick as-prepared Ni88Cu12 film has a maximum natural resonance frequency of 2.1 GHz, which is attributed to the uniaxial anisotropy of the as-prepared Ni88Cu12 film. The saturation magnetization of the 300 °C-treated 105-nm-thick film decreases to 3.01 × 105 A/m. However, the saturation magnetization decreases to 5.9 × 105 A/m after heat treatment at 400 °C. Moreover, the ferromagnetic resonance peak of the film narrows after being treated at 300 °C, and the resonance frequency decreases to 1.95 GHz.

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Enhancement of resonance frequency of stripe domain soft magnetic film by oblique sputtering

Cited by 3 publications

References 41 publications

Magnetization enhanced the multiple magnetic domain-dominated resonance modes in stripe domain films

Magnetization enhanced the multiple magnetic domain-dominated resonance modes in stripe domain films

Fe@SiO2@(MnZn)Fe2O4 soft magnetic composites with enhanced permeability and low core loss for high-frequency applications

Influence of magentic annealing temperature on microstructure and magnetic properties of NiCu alloy film

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