The current controlled modulation of nano-contact based spin torque oscillator (STO) pairs is studied in both the synchronized and non-synchronized states. The synchronized state shows a well behaved modulation and demonstrates robust mutual locking even under strong modulation. The power distribution of the modulation sidebands can be quantitatively described by assuming a single oscillator model. However, in the non-synchronized state, the modulation sidebands are not well described by the model, indicating interactions between the two individual nano-contact STOs. These findings are promising for potential applications requiring the modulation of large synchronized STO arrays.
@article{arxiv.1007.2305,
title = {Frequency modulation of spin torque oscillator pairs},
author = {Ye. Pogoryelov and P. K. Muduli and S. Bonetti and E. Iacocca and Fred Mancoff and Johan Åkerman},
journal= {arXiv preprint arXiv:1007.2305},
year = {2011}
}