Thickness dependence of spin torque ferromagnetic resonance in Co 75Fe25/Pt bilayer films

A. Ganguly; K. Kondou; H. Sukegawa; S. Mitani; S. Kasai; Y. Niimi; Y. Otani; A. Barman

doi:10.1063/1.4865425

Thickness dependence of spin torque ferromagnetic resonance in Co ₇₅Fe₂₅/Pt bilayer films

A. Ganguly, K. Kondou, H. Sukegawa, S. Mitani, S. Kasai, Y. Niimi, Y. Otani, A. Barman

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Abstract

The spin Hall angle of Pt in Co₇₅Fe₂₅/Pt bilayer films was experimentally investigated by means of the spin-torque ferromagnetic resonance and the modulation of damping measurements. By comparing the present results with the Ni₈₀Fe₂₀/Pt system, we found that the ferromagnetic layer underneath the Pt one greatly affects the estimation of the spin Hall angle. We also discuss the spin diffusion length of Pt and the ferromagnetic thickness dependence of the Gilbert damping coefficient.

Original language	British English
Article number	072405
Journal	Applied Physics Letters
Volume	104
Issue number	7
DOIs	https://doi.org/10.1063/1.4865425
State	Published - 17 Feb 2014

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title = "Thickness dependence of spin torque ferromagnetic resonance in Co 75Fe25/Pt bilayer films",

abstract = "The spin Hall angle of Pt in Co75Fe25/Pt bilayer films was experimentally investigated by means of the spin-torque ferromagnetic resonance and the modulation of damping measurements. By comparing the present results with the Ni80Fe20/Pt system, we found that the ferromagnetic layer underneath the Pt one greatly affects the estimation of the spin Hall angle. We also discuss the spin diffusion length of Pt and the ferromagnetic thickness dependence of the Gilbert damping coefficient.",

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AU - Ganguly, A.

AU - Kondou, K.

AU - Sukegawa, H.

AU - Mitani, S.

AU - Kasai, S.

AU - Niimi, Y.

AU - Otani, Y.

AU - Barman, A.

PY - 2014/2/17

Y1 - 2014/2/17

N2 - The spin Hall angle of Pt in Co75Fe25/Pt bilayer films was experimentally investigated by means of the spin-torque ferromagnetic resonance and the modulation of damping measurements. By comparing the present results with the Ni80Fe20/Pt system, we found that the ferromagnetic layer underneath the Pt one greatly affects the estimation of the spin Hall angle. We also discuss the spin diffusion length of Pt and the ferromagnetic thickness dependence of the Gilbert damping coefficient.

AB - The spin Hall angle of Pt in Co75Fe25/Pt bilayer films was experimentally investigated by means of the spin-torque ferromagnetic resonance and the modulation of damping measurements. By comparing the present results with the Ni80Fe20/Pt system, we found that the ferromagnetic layer underneath the Pt one greatly affects the estimation of the spin Hall angle. We also discuss the spin diffusion length of Pt and the ferromagnetic thickness dependence of the Gilbert damping coefficient.

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JO - Applied Physics Letters

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Thickness dependence of spin torque ferromagnetic resonance in Co ₇₅Fe₂₅/Pt bilayer films

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