Penetration Depth of Transverse Spin Current in Ferromagnetic Metals
Tomohiro Taniguchi, Satoshi Yakata, Hiroshi Imamura, Yasuo Ando
TL;DR
This paper investigates the penetration depth of transverse spin currents in ferromagnetic metals by analyzing ferromagnetic resonance spectra, providing a specific measurement for Co at 1.7 nm using spin pumping theory.
Contribution
It introduces a method to measure the transverse spin current penetration depth in ferromagnetic metals through FMR spectrum analysis.
Findings
Penetration depth of transverse spin current in Co is 1.7 nm.
FMR spectrum analysis effectively determines spin current penetration depths.
Theoretical analysis aligns with experimental measurements.
Abstract
The line width of the ferromagnetic resonance (FMR) spectrum of Cu/CoFeB/Cu/Co/Cu is studied. Analyzing the FMR spectrum by the theory of spin pumping, we determined the penetration depth of the transverse spin current in the Co layer. The obtained penetration depth of Co is 1.7 nm.
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