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2020•AIP AdvancesOpen access

Spin Hall angle and spin diffusion length of permalloy

Yi‐Hsiang Huang, Yi-Chien Weng, Chi‐Te Liang, Jauyn Grace Lin

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Abstract

The inverse spin Hall effect (ISHE) in a ferromagnetic material (FM) has been attracting much attention due to its importance in spintronic applications. ISHE, which converts a spin current into a charge current, is an effective method for detecting spin currents. In this work, we report the observation of ISHE on permalloy (Py) thin films under the ferromagnetic resonance condition. The values of the spin Hall angle (θSHE) and the spin diffusion length (λPy) for Py are determined to be 0.034% and 7.0 nm, respectively. The values of θSHE and λPy are investigated for the first time with spin pumping techniques for a FM.

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What this paper is about

The inverse spin Hall effect (ISHE) in a ferromagnetic material (FM) has been attracting much attention due to its importance in spintronic applications. ISHE, which converts a spin current into a charge current, is an effective method for detecting spin currents. In this work, we report the observation of ISHE on permalloy (Py) thin films under the ferromagnetic resonance condition. The values of the spin Hall angle (θSHE) and the spin diffusion length (λPy) for Py are determined to be 0.034% and 7.0 nm, respectively. The values of θSHE and λPy are investigated for the first time with spin pumping techniques for a FM.

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Available abstract

The inverse spin Hall effect (ISHE) in a ferromagnetic material (FM) has been attracting much attention due to its importance in spintronic applications. ISHE, which converts a spin current into a charge current, is an effective method for detecting spin currents. In this work, we report the observation of ISHE on permalloy (Py) thin films under the ferromagnetic resonance condition. The values of the spin Hall angle (θSHE) and the spin diffusion length (λPy) for Py are determined to be 0.034% and 7.0 nm, respectively. The values of θSHE and λPy are investigated for the first time with spin pumping techniques for a FM.

Key concepts: Permalloy, Spintronics, Spin Hall effect, Spin pumping, Condensed matter physics, Ferromagnetic resonance, Spin (aerodynamics), Spin diffusion

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