Title :
Dynamic excitations of nanomagnet magnetization driven by spin-polarized current
Author :
Krivorotov, I.N. ; Emley, N.C. ; Sankey, J.C. ; Ralph, D.C. ; Buhrman, R.A.
Author_Institution :
California Univ., Irvine
Abstract :
A current of spin-polarized electrons injected into a metallic nanomagnet exerts torque on the magnetization and may excite magnetization autooscillations. The aim of present work is to study spectral and transient properties of such excitations. We study current-driven excitations in a permalloy (Py) elliptical nanomagnet. We also make time-resolved measurements of the ac voltage generated by the current-driven excitations using a storage oscilloscope.
Keywords :
Permalloy; magnetisation; nanostructured materials; spin valves; NiFe; ac voltage; current-driven excitations; dynamic excitations; metallic nanomagnet; nanomagnet magnetization; permalloy elliptical nanomagnet; spectral properties; spin-polarized current; spin-polarized electrons; time-resolved spectra; transient properties; AC generators; Current measurement; DC generators; Magnetic anisotropy; Magnetization; Oscilloscopes; Physics; Spin valves; Torque; Voltage;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.375412
