Title :
Low-frequency noise in NiFe/Cu spin-valves
Author :
Kirschenbaum, L.S. ; Rogers, C.T. ; Russek, S.E. ; Kim, Young K.
Author_Institution :
Condensed Matter Lab., Colorado Univ., Boulder, CO, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
We report one of the first observations of low-frequency noise of NiFe/Cu spin-valves. Although the observed noise is very low in comparison to multilayer systems, it is typically concentrated in the linear response region where such devices are expected to operate. Increased noise is also associated with Barkhausen jumps in the magnetoresistance trace. In devices one micrometer high, structures start to appear in the noise spectra as a perturbation to the simple 1/f-like noise observed in larger devices
Keywords :
1/f noise; Barkhausen effect; Permalloy; copper; giant magnetoresistance; magnetic multilayers; magnetic noise; 1/f-like noise; Barkhausen jumps; Ni80Fe20-Cu; linear response region; low-frequency noise; magnetoresistance; noise spectra; spin-valves; Battery charge measurement; Fluctuations; Geometry; Low-frequency noise; Magnetic noise; Magnetoresistance; Magnetostatics; NIST; Noise level; Thermal resistance;
Journal_Title :
Magnetics, IEEE Transactions on
