Influence of Sputtering Gas Pressure on High-Frequency Soft Magnetic Properties of FeCoN Thin Film

Xu, Feng; Liao, Zhiqin; Huang, Qijun; Ong, Chong Kim; Li, Shandong

doi:10.1109/tmag.2011.2151834

Cited by 9 publications

(6 citation statements)

References 17 publications

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“…Soft ferromagnetic (FM) thin films have been widely studied because of its high frequency applications [1][2][3][4]. Usually, 3 Present address: Department of Physics, Harcourt Butler Technical University, Nawabganj, Uttar Pradesh, 208002, India * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic properties in soft (CoFeB)/hard (Co) bilayers deposited under different Ar gas pressure

Nayak

Mohanty

Singh

2022

J. Phys.: Condens. Matter

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We have studied the effect of deposition pressure on the magnetization reversal, domains, anisotropy and damping constant in the ferromagnetic (CoFeB and Co) single and bilayer samples. Hysteresis measured by magneto-optic Kerr microscopy for the single layer films prepared at higher deposition pressure indicate no change of loop shape i.e. isotropic behaviour. An enhancement of anisotropy has been observed in the bilayer samples than the single layer samples prepared at a particular deposition condition. However, increasing the deposition pressure to 50 sccm for the bilayer samples, anisotropy gets reduced. For single layer Co film deposited at 10 sccm exhibits branch and patch like domains for different angle between the easy axis and the external magnetic field. However, the Co film deposited at 50 sccm exhibits ripple like domains. In the case of single layer CoFeB, branch and patch like domains are observed deposited at 10 sccm. Patch like domains are found for the CoFeB films deposited at 50 sccm. Pinned labyrinth and ripple kind of magnetic domains along with the big branch domains are found in the bilayer samples. The pinned domains may be due to the interfacial exchange coupling. Similar values of damping constants have been observed for different thin films prepared at different deposition pressure.

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Section: Introductionmentioning

confidence: 99%

“…This modifies the magnetic properties by depositing magnetic films on top of it. Thin films deposited by sputtering technique have grannular structures and hence, their soft magnetic properties depend on the microstructure [3]. Doping such as Si-O, Al-O, and Si-N is one method to find the granular structure [3].…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties in soft (CoFeB)/hard (Co) bilayers deposited under different Ar gas pressure

Nayak

Mohanty

Singh

2022

J. Phys.: Condens. Matter

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“…Besides, FeCo is difficult to achieve good soft magnetic properties because the FeCo alloy shows a large saturation magnetostriction coefficient (around (40–65) × 10 −6 ). FeCoN thin film is attracting more and more attentions since its good soft magnetic property and high potential in high-frequency applications [16,17,18,19].…”

Section: Introductionmentioning

confidence: 99%

Marked Enhancement of Roll-Off Frequency in FeCoN Synthetic Antiferromagnetic Films Deposited by Oblique Incidence

et al. 2019

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A series of FeCoN films were successfully deposited on glass substrates in a magnetron sputtering system. Using oblique incidence method and FeCoN/Ru/FeCoN synthetic antiferromagnetic (SAF) structure, two additional anisotropies energy were introduced: oblique incidence anisotropy and exchange anisotropy energy, which marked enhancement of the effective magnetic anisotropy (Hk). The increment of Hk results in a significant improvement in the roll-off frequency of these films. The roll-off frequency of FeCoN/Ru/FeCoN films with SAF structure can reach up to 8.6 GHz. A feasible approach to conveniently controlling Hk of soft magnetic thin films by using oblique deposition and SAF structure can further improve their properties for the potential applications in the high frequency region.

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“…The film is in the 𝑥-𝑦 plane. One way to determine the resonance frequency from the Landau-Lifshitz-Gilbert equation [18][19][20][21]23] is by free energy density of system 𝐹 , which could be characterized as the following formula, including Zeeman, demagnetizing and anisotropy contributions, [24]…”

mentioning

confidence: 99%

“…where 𝐹 𝜃𝜃 , 𝐹 𝜑𝜑 and 𝐹 𝜃𝜑 are double derivatives of 𝐹 , which are all calculated at the equilibrium angle 𝜃 and 𝜑 of magnetization 𝑀 , and 𝛾 is the gyromagnetic ratio. The resonance frequency 𝜔 of the uniform precession model with an external field in the film plane is [2,6,19,20,25]…”

mentioning

confidence: 99%

Structural and Magnetic Properties of Co ₂ MnSi Thin Film with a Low Damping Constant

Qiao

Zhang

Qin

et al. 2015

Chinese Phys. Lett.

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Co2MnSi thin films are made by magnetron sputtering onto MgO (001) substrates. The crystalline quality is improved by increasing depositing temperature and/or annealing temperature. The sample deposited at 550 ∘ C and subsequently annealed at 550 ∘ C (sample I) exhibits a pseudo-epitaxial growth with partially ordered 𝐿21 phase. Sample I shows a four-fold magnetic anisotropy, in addition to a relatively weak uniaxial anisotropy. The Gilbert damping factor of sample I is smaller than 0.001, much smaller than reported ones. The possible reasons responsible for the small Gilbert damping factor are discussed, including weak spin-orbit coupling, small density of states at Fermi level, and so on.

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Influence of Sputtering Gas Pressure on High-Frequency Soft Magnetic Properties of FeCoN Thin Film

Cited by 9 publications

References 17 publications

Magnetic properties in soft (CoFeB)/hard (Co) bilayers deposited under different Ar gas pressure

Magnetic properties in soft (CoFeB)/hard (Co) bilayers deposited under different Ar gas pressure

Marked Enhancement of Roll-Off Frequency in FeCoN Synthetic Antiferromagnetic Films Deposited by Oblique Incidence

Structural and Magnetic Properties of Co ₂ MnSi Thin Film with a Low Damping Constant

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Influence of Sputtering Gas Pressure on High-Frequency Soft Magnetic Properties of FeCoN Thin Film

Cited by 9 publications

References 17 publications

Magnetic properties in soft (CoFeB)/hard (Co) bilayers deposited under different Ar gas pressure

Magnetic properties in soft (CoFeB)/hard (Co) bilayers deposited under different Ar gas pressure

Marked Enhancement of Roll-Off Frequency in FeCoN Synthetic Antiferromagnetic Films Deposited by Oblique Incidence

Structural and Magnetic Properties of Co 2 MnSi Thin Film with a Low Damping Constant

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Structural and Magnetic Properties of Co ₂ MnSi Thin Film with a Low Damping Constant