Journal
PHYSICAL REVIEW B
Volume 86, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.134420
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Funding
- Deutsche Forschungsgemeinschaft (DFG)
- National Science Foundation [DMR-0747609, ECCS-0967195]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1218419] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1218414] Funding Source: National Science Foundation
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We report an experimental investigation of parametric excitation of magnetization oscillations in a permalloy microdisk in the presence of a pure spin current. The latter is generated by an adjacent Pt layer due to the spin Hall effect. We demonstrate that the spin torque induced by the pure spin current can significantly reduce the threshold for parametric instability, and modify the frequency range of the parametrically excited oscillation at a given pumping power. Our results show that pure spin currents can be utilized for stimulation and control of nonlinear dynamic magnetic phenomena in microscopic structures.
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