Time-domain detection of current controlled magnetization damping in Pt/Ni{sub 81}Fe{sub 19} bilayer and determination of Pt spin Hall angle

Journal Article · Mon Sep 15 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4896277· OSTI ID:22303524

Ganguly, A.; Haldar, A.; Sinha, J.; Rowan-Robinson, R. M.; Jaiswal, S.; Hindmarch, A. T.

The effect of spin torque from the spin Hall effect in Pt/Ni{sub 81}Fe{sub 19} rectangular bilayer film was investigated using time-resolved magneto-optical Kerr microscopy. Current flow through the stack resulted in a linear variation of effective damping up to ±7%, attributed to spin current injection from the Pt into the Ni{sub 81}Fe{sub 19}. The spin Hall angle of Pt was estimated as 0.11 ± 0.03. The modulation of the damping depended on the angle between the current and the bias magnetic field. These results demonstrate the importance of optical detection of precessional magnetization dynamics for studying spin transfer torque due to spin Hall effect.

• OSTI ID: 22303524
• Journal Information: Applied Physics Letters, Vol. 105, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CURRENTS
DETECTION
FILMS
HALL EFFECT
INJECTION
IRON ALLOYS
KERR EFFECT
LAYERS
MAGNETIC FIELDS
MAGNETIZATION
MAGNETO-OPTICAL EFFECTS
MODULATION
NICKEL ALLOYS
PLATINUM
SPIN
TIME RESOLUTION
TORQUE