Emergent 1/f Noise in Ensembles of Random Telegraph Noise Oscillators.

The emergence of 1/f noise from an aggregate of 1/f(2) noise signals in magnetic nanodots undergoing random telegraph oscillations in their magnetization is reported. This emergence is found to occur with as few as two random telegraph noise (RTN) oscillators producing 1/f noise across two decades of frequency bandwidth, and with fewer than ten such oscillators producing 1/f noise across over four decades. The RTN fluctuations observed are as small as one part in 10 000 compared to dc voltage signals but still generate easily observable 1/f noise at up to 10(5) Hz. These observations may explain the historic difficulty in identifying RTN oscillator sources of 1/f noise.