Spin transfer by nonuniform current injection into a nanomagnet
Applied Physics Letters, cilt.88, sa.20, 2006 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 88 Sayı: 20
- Basım Tarihi: 2006
- Doi Numarası: 10.1063/1.2206683
- Dergi Adı: Applied Physics Letters
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Boğaziçi Üniversitesi Adresli: Hayır
Özet
We have used nanofabrication techniques to incorporate an ∼20-30 nm diameter nanoaperture within a 150×250 nm2 elliptical magnetic multilayer to enable the localized injection of spin-polarized currents into a thin film nanomagnet. This results in very low spin transfer currents being required for at least partial nanomagnet reversal as well as for onset of dynamic precession. Micromagnetic simulations using Landau-Liftshitz-Gilbert equation with a spin-torque term indicate that reversal occurs via domain nucleation at the injection site followed by domain wall propagation away from the aperture, with the nanomagnet ending in one of several different states depending upon the current amplitude. © 2006 American Institute of Physics.