Static and dynamic magnetic properties of Fe20Ni80 and Co20Fe60B20 material-modulated stripe-patterned thin films

Feng, Hongmei; Zhu, Zengtai; Gao, Runliang; Huang, Yi; Li, Xiaolei; Liu, Qingfang; Wang, Jianbo

doi:10.1016/j.jmmm.2019.166008

Cited by 4 publications

(1 citation statement)

References 25 publications

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“…3a, b ). It can be noticed that the f r of Fe 3 C-700 microflakes, containing the lowest magnetic anisotropy of all the samples, can even reach 9.73 GHz, which is far higher than that of previously reported soft magnetic materials such as c-axis oriented hcp -(CoIr) thin films (4.5 GHz) 39 , Fe 20 Ni 80 and Co 20 Fe 60 B 20 material-modulated stripe-patterned thin films (5.8 GHz) 40 , and Sm 1.5 Y 0.5 Fe 17-x Si x and their composites (5.0 GHz) 20 . The results indicate that the magnetic loss abilities can be significantly optimized in the 2D Fe 3 C microflakes by adjusting the isothermal temperature, ascribed to the manipulation of shape anisotropies.…”

Section: Resultsmentioning

confidence: 56%

Highly anisotropic Fe3C microflakes constructed by solid-state phase transformation for efficient microwave absorption

Zhao,

Gao,

et al. 2024

Nat Commun

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Soft magnetic materials with flake geometry can provide shape anisotropy for breaking the Snoek limit, which is promising for achieving high-frequency ferromagnetic resonances and microwave absorption properties. Here, two-dimensional (2D) Fe3C microflakes with crystal orientation are obtained by solid-state phase transformation assisted by electrochemical dealloying. The shape anisotropy can be further regulated by manipulating the thickness of 2D Fe3C microflakes under different isothermally quenching temperatures. Thus, the resonant frequency is adjusted effectively from 9.47 and 11.56 GHz under isothermal quenching from 700 °C to 550 °C. The imaginary part of the complex permeability can reach 0.9 at 11.56 GHz, and the minimum reflection loss (RLmin) is −52.09 dB (15.85 GHz, 2.90 mm) with an effective absorption bandwidth (EAB≤−10 dB) of 2.55 GHz. This study provides insight into the preparation of high-frequency magnetic loss materials for obtaining high-performance microwave absorbers and achieves the preparation of functional materials from traditional structural materials.

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Section: Resultsmentioning

confidence: 56%

Highly anisotropic Fe3C microflakes constructed by solid-state phase transformation for efficient microwave absorption

Zhao,

Gao,

et al. 2024

Nat Commun

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Tuning the Ferromagnetic Resonance Frequency of Microstructured Permalloy Film on Flexible Substrate

Lei,

Zhang,

et al. 2024

Physica Rapid Research Ltrs

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The importance of flexible ferromagnetic films in the application of flexible spintronic devices and microwave magnetic devices underscores the necessity for an in‐depth understanding of the dynamic magnetic properties of these films. In particular, it is crucial to comprehend the regulation of the ferromagnetic resonance (FMR) frequency of flexible ferromagnetic films. This work outlines the preparation of periodic permalloy microstrip arrays with stripe domain on flexible PET films and applies them to linearly tune the FMR. The high‐frequency optical branch (5.17 GHz) and low‐frequency acoustic branch (2.89 GHz) are observed in the direction perpendicular (x‐direction) and parallel (y‐direction) to the microstrip, respectively. The Young’s modulus mismatch between the PET film and permalloy layer leads to the directional distribution of local tension. This results in the enhancement of the Ht (219.4 Oe) required for the in‐plane uniform precession on the PET film, compared to that on the Si substrate (181.6 Oe). By adjusting the width and thickness of the permalloy microstrip, Ht can be adjusted linearly on the PET film. This flexible ferromagnetic film with linear regulation of FMR frequency presents a new option for the future development of flexible microwave detectors and filters.This article is protected by copyright. All rights reserved.

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Codeposition behavior of Fe-Ni alloys: A review in mechanisms, preparation and effects on composition

Yang,

Xie,

Sun

et al. 2024

Materials Science and Engineering: B

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Static and dynamic magnetic properties of Fe20Ni80 and Co20Fe60B20 material-modulated stripe-patterned thin films

Cited by 4 publications

References 25 publications

Highly anisotropic Fe3C microflakes constructed by solid-state phase transformation for efficient microwave absorption

Highly anisotropic Fe3C microflakes constructed by solid-state phase transformation for efficient microwave absorption

Tuning the Ferromagnetic Resonance Frequency of Microstructured Permalloy Film on Flexible Substrate

Codeposition behavior of Fe-Ni alloys: A review in mechanisms, preparation and effects on composition

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