Thickness dependence of spin torque ferromagnetic resonance in Co{sub 75}Fe{sub 25}/Pt bilayer films

Journal Article · Mon Feb 17 04:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4865425· OSTI ID:22283138

Ganguly, A.; Sukegawa, H.; Mitani, S. ^[1]; Kasai, S. ^[2]; Niimi, Y. ^[3]; Otani, Y. ^[2]

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1. National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0047 (Japan)
2. RIKEN-CEMS, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
3. Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581 (Japan)

The spin Hall angle of Pt in Co{sub 75}Fe{sub 25}/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 Ni{sub 80}Fe{sub 20}/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.

• OSTI ID: 22283138
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 7 Vol. 104; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COBALT BASE ALLOYS
COMPARATIVE EVALUATIONS
DIFFUSION LENGTH
FERROMAGNETIC RESONANCE
HALL EFFECT
INTERFACES
IRON ALLOYS
LAYERS
MODULATION
PLATINUM
SPIN
THICKNESS
THIN FILMS
TORQUE