Effect of the growth rate on the structural, magnetic and transport properties of NiFe thin films

Goyat, Ekta; Pandey, Lalit; Hait, Soumyarup; Gupta, Nanhe Kumar; Mishra, Vireshwar; Kumar, Nakul; Singh, Harjinder; Sharma, Nikita; Chaudhary, Sujeet

doi:10.1007/s10854-023-10372-3

Cited by 3 publications

(2 citation statements)

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“…Interestingly, it was observed that the coercivity of both the samples varies around 5 Oe to 6 Oe. The coercivity values are consistent with previously reported articles [12].…”

Section: Magnetic Measurementssupporting

confidence: 92%

“…In conjunction with magnetization switching, the magnetization relaxation mechanism and Gilbert damping (α) play pivotal role in determining real-time magnetization dynamics of the system and decides its suitability for spintronics devices [10,11]. The primary requirement for devices like spin-torque transfer-based MRAM and microwave devices incorporate rapid magnetization switching and also necessitate a low Gilbert damping (α) for reduction of current density to minimize the power consumption [4,12,13]. Generally soft magnetic transition metal alloys are preferred for such applications.…”

Section: Introductionmentioning

confidence: 99%

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Magnetization dynamics and domain reversal in electrodeposited permalloy thin films: impact of thickness and annealing treatment

Dev,

Reddy,

Medwal

et al. 2024

Phys. Scr.

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The domain reversal and magnetization dynamics of electrodeposited permalloy (Fe20Ni80) thin films on conducting ITO/glass substrate was investigated using Magneto-optic Kerr effect microscopy and ferromagnetic resonance. Permalloy thin films were electrodeposited with thickness ranging from 66 nm to 330 nm. Synchrotron XRD confirmed the deposited permalloy in FCC phase without any impurity. The squared hysteresis with very low coercivity (Hc ~ 5 Oe) established soft magnetic nature of the films. Further, angular MOKE hysteresis measurements with simultaneous domain imaging revealed four-fold surface anisotropy in as-deposited film ensuing magnetization reversal via branched and ripple domains. The annealing treatment in Ar+H2 atmosphere removed surface anisotropy and renovated the magnetization reversal through 180˚ branched domains with rapid magnetization switching. Ferromagnetic resonance spectroscopy discloses reduction in the gyromagnetic ratio (γ) as well as in Gilbert damping parameter (α) as the film thickness increases. The lowest Gilbert damping for 330 nm film measured at 0.022, which further reduced to 0.018 after annealing. The combination of rapid magnetization switching and low Gilbert damping in the electrodeposited permalloy thin films render them promising for implementation in high-frequency microwave devices devices and magnetic sensors.

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“…Interestingly, it was observed that the coercivity of both the samples varies around 5 Oe to 6 Oe. The coercivity values are consistent with previously reported articles [12].…”

Section: Magnetic Measurementssupporting

confidence: 92%