Soft Magnetism

Jin, H. J.; Miyazaki, T.

doi:10.1007/978-3-642-25583-0_9

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…Thereafter, the magnetic permeability decreases, which is consistent with the trend observed in the saturation magnetization as a function of NaNO 2 concentration. The Acher equation posits a fundamental relationship in magnetic materials, asserting that the maximum real part of permeability shares an inverse proportionality with the cutoff frequency, as cited in the references [35,36]. This study delves into two primary magnetization mechanisms: domain rotation and domain wall motion.…”

Section: Resultsmentioning

confidence: 91%

Effect of Oxidant Concentration on Properties of Ferrite Films by Spin-Spray Deposition

Liu,

Liao,

Huang

et al. 2024

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In response to the demands for high frequency, miniaturization, and high integration in electronic devices, such as inductors and DC-DC convertors, nickel–zinc ferrite thin films exhibit significant application value and development potential. For regulating the magnetic properties and microstructure of spin-sprayed polycrystalline ferrite materials, a comprehensive understanding of the impact of oxidant concentration on film reaction is essential. This study finds that as the concentration of the NaNO2 oxidant increases, the grain size of the nickel–zinc ferrite thin film samples progressively enlarges. Due to the preferential occupation of iron ions at the B sites, the saturation magnetization correspondingly increases. However, when the oxidant concentration becomes excessive, the preferential (222) orientation growth of the film is disrupted, leading to the agglomeration and uneven growth of grains, transitioning from triangular plate-like to spherical in shape. This increase in grain size alters the magnetization mechanism of the thin film, predominantly favoring domain wall movement. Upon analyzing the microstructure and magnetic characteristics, it becomes evident that the concentration of oxidant is a key determinant in the spin-spray deposition process.

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Section: Resultsmentioning

confidence: 91%

Effect of Oxidant Concentration on Properties of Ferrite Films by Spin-Spray Deposition

Liu,

Liao,

Huang

et al. 2024

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“…, and (ii) domain wall motion The Archer equation states that the maximum real part of permeability is inversely proportional to the cutoff frequency [38]. Two magnetization mechanisms, domain rotation, and domain wall motion, exhibit different rules of change concerning grain size: (i) domain rotation µ i ≈ µ 0 M 2 s 3 K = µ 0 M 2 s A 3 3K 4 1 D 6 , and (ii) domain wall motion µ i ≈ µ 0 M 2 s A 3 K 4 1 D 6 [39]. In both cases, permeability is inversely related to grain size.…”

Section: Resultsmentioning

confidence: 99%

Effects of Substrates on Thin-Film Growth of Nickel Zinc Ferrite by Spin-Spray Deposition

Liu

Zhao

Song³

et al. 2023

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In certain applications, such as on-chip integrated inductors, ferrite materials are highly desirable owing to their superior magnetic and insulation properties. Spin-spray deposition is a promising method for producing high-quality thin films of ferrite, as it does not require a vacuum and can operate at low temperatures. A comprehensive analysis was conducted to investigate the influence of the substrate on the microstructure and magnetic properties of the thin films, and the growth mechanism of this phenomenon was discussed. In addition, first-order reversal curve measurements were used to study the coercivity and grain size distribution. The results indicate that thermal conductivity played a significant role in determining the thin-film growth during spin spray deposition. Polyimide is considered a more suitable substrate under this process due to its appropriate thermal conductivity, which results in more uniform grain distribution and improved magnetic properties, with maximum permeability and a cutoff frequency reaching 55 and 485 MHz, respectively. Our results provide valuable insights into the mechanism of spin-spray deposition and offer an effective way to tune the performance of ferrite thin-film materials.

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Soft Magnetism

Cited by 2 publications

References 25 publications

Effect of Oxidant Concentration on Properties of Ferrite Films by Spin-Spray Deposition

Effect of Oxidant Concentration on Properties of Ferrite Films by Spin-Spray Deposition

Effects of Substrates on Thin-Film Growth of Nickel Zinc Ferrite by Spin-Spray Deposition

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