An investigation of the magnetic state dependent low frequency noise in magnetic tunnel junctions

Feng Guo; McKusky, Greg; Dahlberg, E. Dan
August 2009
Applied Physics Letters;8/10/2009, Vol. 95 Issue 6, p062512
Academic Journal
The low frequency noise in magnetic tunnel junctions was studied as a function of applied magnetic field. In magnetic states where the magnetization is reversing, the measurement indicates a 1/f2 spectrum whereas at all other applied fields a 1/f spectrum is observed. The 1/f2 spectra are found to be an artifact of the magnetic after effect. Without the artificial influence of the magnetic after effect, only 1/f spectra are observed.


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