Single spin-torque vortex oscillator using combined bottom-up approach and e-beam lithography
(2013) Applied Physics Letters — Vol. 102, n° 22, p. 222402 (2013)
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- Abstract
- A combined bottom-up assembly of electrodeposited nanowires and electron beam lithography technique has been developed to investigate the spin transfer torque and microwave emission on specially designed nanowires containing a single Co/Cu/Co pseudo spin valve. Microwave signals have been obtained even at zero magnetic field. Interestingly, high frequency vs. magnetic field tunability was demonstrated, in the range 0.4–2 MHz/Oe, depending on the orientation of the applied magnetic field relative to the magnetic layers of the pseudo spin valve. The frequency values and the emitted signal frequency as a function of the external magnetic field are in good quantitative agreement with the analytical vortex model as well as with micromagnetic simulations.
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Citations
Abreu Araujo, F., Piraux, L., Antohe, V., Cros, V., & Gence, L. (2013). Single spin-torque vortex oscillator using combined bottom-up approach and e-beam lithography. Applied Physics Letters, 102(22), 222402. https://doi.org/10.1063/1.4808451 (Original work published 2013)