Effect of Low‐Frequency Alternative‐Current Magnetic Susceptibility in Ni₈₀Fe₂₀ Thin Films

Abstract

X-ray diffraction (XRD) results indicate that the NiFe thin films had a face-centered cubic (FCC) structure. Post-annealing treatment increased the crystallinity of NiFe films over those at room temperature (RT), suggesting that NiFe crystallization yields FCC (111) texturing. Post-annealing treatments increase crystallinity over that obtained at RT. This paper focuses on the maximum alternative-current magnetic susceptibility(χac)value of NiFe thin films with resonance frequency(fres)at low frequencies from 10 Hz to 25000 Hz. These results demonstrate that theχacof NiFe thin films increased with post-annealing treatment and increasing thickness. The NiFe (111) texture suggests that the relationship between magneto-crystalline anisotropy and the maximumχacvalue with optimal resonance frequency(fres)increased spin sensitivity at optimalfres. The results obtained under the three conditions revealed that the maximumχacvalue and optimalfresof a 1000 Å-thick NiFe thin film are 3.45 Hz and 500 Hz, respectively, following postannealing atTA=250°C for 1 h. This suggests that a 1000 Å NiFe thin film post-annealed atTA=250°C is suitable for gauge sensor and transformer applications at low frequencies.

Magnetic properties, adhesive characteristics, and optical properties of Co40Fe40W20films

“…The results suggest that the maximum χ ac increased from 0.03 to the highest value of 0.27 as t f increased from 18 nm to 90 nm. These results could be explained by considering the nano-magneto crystalline anisotropy of the (110) nanocrystalline crystallization [35]. The maximum χ ac results were in line with previous XRD diffracted studies.…”

Effect of Low-Frequency AC Magnetic Susceptibility and Magnetic Properties of CoFeB/MgO/CoFeB Magnetic Tunnel Junctions

“…The results suggest that an excitation frequency of 10 to 30 Hz maximizes the χ ac of the magnetic exchange-coupled signal, and as the frequency increases above 30 Hz, the χ ac obtained from the signal declines, suggesting that the CoFeB/MgO/CoFeB MTJ is suited to use at low frequencies. The optimal maximum susceptibility, at frequencies in the range of 10 to 30 Hz, can be utilized in inductors and transformers [28,29]. …”

Ni-Fe alloy nanostructured electrodes for water splitting in alkaline electrolyser

“…This result agrees with the data of Llavona et al [52], which show that, for potential values really similar to the two values we used in this work to perform the pulsed deposition, the NWs composition is quite homogeneous. 47-1405) [61,[65][66][67][68]. Chang et al [66] found that with the increase of Fe, the alloy changes from fcc phase to bcc.…”

“…In particular, the best alloys are those with other transition metals, such as NiPd [27,28], NiMo [29][30][31], NiZn [32,33], or, even more evidently, with the metals of the iron group, such as NiCo [34][35][36] and NiFe [37]. In addition to the excellent electrocatalytic property and high chemical stability in alkaline media, the latter are known for their mechanical and magnetic properties [38][39][40], making them excellent materials in the field of microelectromechanics.…”