Effect of low-frequency AC magnetic susceptibility of Ru/Co60Fe20V20 and Ta/Co60Fe20V20 films

Chen, Yuan-Tsung; Chang, Yung‐Huang; Liu, Wen-Jen; Liang, Wei-Chiao; Hsieh, Chin-Heng; Wu, Te‐Ho

doi:10.1016/j.jmmm.2018.05.096

Cited by 1 publication

(1 citation statement)

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“…The optimal resonance frequency (f res ) was detected by an χ ac analyzer, which means the frequency of the maximum χ ac . This suggests that Co 40 Fe 40 Sm 20 thin films are well suited for applications in low-frequency magnetic devices such as transformers, spin valves, and magnetic recording mediums [30]. The summary of the D, Ra, Rs, ρ, maximum χ ac , and optimal resonance frequency of Co 40 Fe 40 Sm 20 thin films subjected to various annealing temperatures is provided in Table 1.…”

Section: Electrical Characteristicsmentioning

confidence: 99%

Studying the Crucial Physical Characteristics Related to Surface Roughness and Magnetic Domain Structure in CoFeSm Thin Films

Fern,

Liu,

Chang

et al. 2023

Coatings

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This study investigated the effects of varying film thicknesses and annealing temperatures on the surface roughness and magnetic domain structure of CoFeSm thin films. The results revealed that as the film thickness increased, both the crystalline size and surface roughness decreased, leading to a reduction in coercivity (Hc) and improved magnetic contrast performance. Energy-dispersive X-ray spectroscopy (EDS) analysis confirmed the presence of cobalt (Co), iron (Fe), and samarium (Sm) within the thin films. Notably, the 40 nm Co40Fe40Sm20 thin film annealed at 200 °C exhibited lower sheet resistance (Rs) and resistivity (ρ), indicating higher conductivity and a relatively higher maximum magnetic susceptibility (χac) at 50 Hz. These findings suggest that these films are well suited for low-frequency magnetic components due to their increased spin sensitivity. The 40 nm Co40Fe40Sm20 thin film, subjected to annealing at 200 °C, displayed a distinct stripe domain structure characterized by prominently contrasting dark and bright patterns. It exhibited the lowest Hc and the highest saturation magnetization (Ms), leading to a significant improvement in their soft magnetic properties. It is proposed that the surface roughness of the CoFeSm thin films plays a crucial role in shaping the magnetic properties of these thin magnetic films.

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Section: Electrical Characteristicsmentioning

confidence: 99%