The low-frequency alternative-current magnetic susceptibility and electrical properties of Si(100)/Fe40Pd40B20(X Å)/ZnO(500 Å) and Si(100)/ZnO(500 Å)/Fe40Pd40B20(Y Å) systems

Chen, Yuan-Tsung; Xie, Sishen; Jheng, H. Y.

doi:10.1063/1.4794985

Cited by 16 publications

(14 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optimal resonance frequency of CoFeVB films is shown in Figure 5. According to the f res value, the maximum χ ac value is measured with the strongest spin sensitivity at this frequency [38,39]. The f res presented an oscillating trend with a minimum critical frequency of 50 Hz.…”

Section: Appl Sci 2020 10 X For Peer Review 3 Of 13mentioning

confidence: 93%

Structure, Magnetic Property, Surface Morphology, and Surface Energy of Co40Fe40V10B10 Films on Si(100) Substrate

Liu

Chang

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

When B and V are added to CoFe material, the mechanical strength and spin tunneling polarization of a CoFe alloy can be improved and enhanced by the high tunneling magnetoresistance (TMR) ratio. Based on these reasons, it is worthwhile investigating Co40Fe40V10B10 films. In this work, X-ray diffraction (XRD) showed that Co40Fe40V10B10 thin films have some distinct phases including CoFe (110), CoFe (200), FeB (130), and V (110) diffracted peaks with the strongest diffracted peak for 30 nm. The lowest low-frequency alternate-current magnetic susceptibility (χac) was detected at 30 nm because the large grain distribution inducing that high coercivity (Hc) enhances the spin coupling strength and low χac. The external field (Hext) had difficulty rotating in the spin state, hence, the spin sensitivity was reduced and the χac value decreased due to increased surface roughness. The 20 mm thickness had the highest χac 1.96 × 10−2 value at 50 Hz of an optimal resonance frequency (fres). The surface energy increased from 34.2 mJ/mm2 to 51.5 mJ/mm2 for Co40Fe40V10B10 films. High surface energy had corresponding strong adhesive performance. According to the magnetic and surface energy results, the optimal thickness is 20 nm due as it had the highest χac and strong adhesion.

show abstract

Section: Appl Sci 2020 10 X For Peer Review 3 Of 13mentioning

confidence: 93%

Structure, Magnetic Property, Surface Morphology, and Surface Energy of Co40Fe40V10B10 Films on Si(100) Substrate

Liu

Chang

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…Table 2 lists the optimal resonance frequency (f res ) of CoFeBY films under four conditions. The maximum χ ac has the highest spin sensitivity with the optimal resonance frequency [ 36 , 37 ]. The f res value of CoFeBY at various thicknesses is less than 250 Hz.…”

Section: Resultsmentioning

confidence: 99%

Effect of Annealing on the Structural, Magnetic and Surface Energy of CoFeBY Films on Si (100) Substrate

et al. 2021

Self Cite

View full text Add to dashboard Cite

The structure, magnetic properties, optical properties and adhesion efficiency of CoFeBY films were studied. Co40Fe40B10Y10 alloy was sputtered onto Si (100) with a thickness of 10–50 nm, and then annealed at room temperature, 100 °C, 200 °C and 300 °C for 1 h. X‑ray diffraction (XRD) showed that the CoFeBY films deposited at room temperature are amorphous. Annealing at 100 °C gave the films enough thermal energy to change the structure from amorphous to crystalline. After annealing, the CoFeBY thin film showed a body-centered cubic (BCC) CoFeB (110) characteristic peak at 44°. However, the low‑frequency alternative‑current magnetic susceptibility (χac) and saturation magnetization (MS) increased with the increase of thickness. CoFeBY thin films had the highest χac and MS after annealing at 300 °C compared to that at other temperatures. After annealing at 300 °C, the surface energy of CoFeBY film is the maximum at 50 nm. Higher surface energy indicated stronger adhesion.

show abstract

“…The optimal resonance frequency (f res ) of CoFeW film is shown in Figure 7. At this frequency, the maximum χ ac is measured with the strongest spin sensitivity [36,37]. The f res shows a downward concave trend with a maximum critical frequency of 1000 Hz.…”

Section: Journal Of Nanomaterialsmentioning

confidence: 88%

Magnetic Properties, Adhesion, and Nanomechanical Property of Co₄₀Fe₄₀W₂₀ Films on Si (100) Substrate

Liu

Chang

et al. 2020

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

In this study, a Co40Fe40W20 alloy was sputtered onto Si (100) with thicknesses (tf) ranging from 18 to 90 nm, and the corresponding structure, magnetic properties, adhesive characteristics, and nanomechanical properties were investigated. X-ray diffraction (XRD) patterns of the Co40Fe40W20 films demonstrated a significant crystalline body-centered cubic (BCC) CoFe (110) structure when the thickness was 42 nm, and an amorphous status was shown when the thickness was 18 nm, 30 nm, 60 nm, and 90 nm. The saturation magnetization (Ms) showed a saturated trend as tf was increased. Moreover, the coercivity (Hc) showed a minimum 1.65 Oe with 30 nm. Hc was smaller than 4.5 Oe owing to the small grain size distribution and amorphous structure, indicating that the Co40Fe40W20 film had soft magnetism. The low-frequency alternating current magnetic susceptibility (χac) decreased as the frequency was increased. The χac revealed a thickness effect when greater thicknesses had a large χac. The maximum χac and optimal resonance frequency (fres) of Co40Fe40W20 were investigated. The maximum χac indicated the spin sensitivity and was maximized at the optimal resonance frequency. The 90 mm thickness had the highest χac 0.18 value at an fres of 50 Hz. The contact angles of the Co40Fe40W20 films are less than 90°, which indicated that the film had a good wetting effect and hydrophilicity. The surface energy was correlated with the adhesion and displayed a concave-down trend. CoFeW films can be used as a seed or buffer layer; therefore, the surface energy and adhesion are very important. The highest surface energy was 30.12 mJ/mm2 at 42 nm and demonstrated high adhesion. High surface energy has corresponding strong adhesive performance. The increased surface roughness can induce domain wall pinning effect and high surface energy, causing a high coercivity and strong adhesion. The increase of hardness and Young’s modulus could be reasonably inferred from the thinner CoFeW films. The hardness and Young’s modulus of CoFeW films are also displayed to saturated tendency when increasing thickness.

show abstract

The low-frequency alternative-current magnetic susceptibility and electrical properties of Si(100)/Fe40Pd40B20(X Å)/ZnO(500 Å) and Si(100)/ZnO(500 Å)/Fe40Pd40B20(Y Å) systems

Cited by 16 publications

References 12 publications

Structure, Magnetic Property, Surface Morphology, and Surface Energy of Co40Fe40V10B10 Films on Si(100) Substrate

Structure, Magnetic Property, Surface Morphology, and Surface Energy of Co40Fe40V10B10 Films on Si(100) Substrate

Effect of Annealing on the Structural, Magnetic and Surface Energy of CoFeBY Films on Si (100) Substrate

Magnetic Properties, Adhesion, and Nanomechanical Property of Co₄₀Fe₄₀W₂₀ Films on Si (100) Substrate

Contact Info

Product

Resources

About

The low-frequency alternative-current magnetic susceptibility and electrical properties of Si(100)/Fe40Pd40B20(X Å)/ZnO(500 Å) and Si(100)/ZnO(500 Å)/Fe40Pd40B20(Y Å) systems

Cited by 16 publications

References 12 publications

Structure, Magnetic Property, Surface Morphology, and Surface Energy of Co40Fe40V10B10 Films on Si(100) Substrate

Structure, Magnetic Property, Surface Morphology, and Surface Energy of Co40Fe40V10B10 Films on Si(100) Substrate

Effect of Annealing on the Structural, Magnetic and Surface Energy of CoFeBY Films on Si (100) Substrate

Magnetic Properties, Adhesion, and Nanomechanical Property of Co40Fe40W20 Films on Si (100) Substrate

Contact Info

Product

Resources

About

Magnetic Properties, Adhesion, and Nanomechanical Property of Co₄₀Fe₄₀W₂₀ Films on Si (100) Substrate