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arXiv · 1303.7148

Spin wave mode coexistence on the nano-scale: A consequence of the Oersted field induced asymmetric energy landscape

Randy K. Dumas·Ezio Iacocca·Stefano Bonetti·Sohrab Sani·Majid Mohseni·Anders Eklund·Johan Persson·Olle Heinonen·Johan Åkerman
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Abstract

It has been argued that if multiple spin wave modes are competing for the same centrally located energy source, as in a nanocontact spin torque oscillator, that only one mode should survive in the steady state. Here, the experimental conditions necessary for mode coexistence are explored. Mode coexistence is facilitated by the local field asymmetries induced by the spatially inhomogeneous Oersted field, which leads to a physical separation of the modes, and is further promoted by spin wave localization at reduced applied field angles. Finally, both simulation and experiment reveal a low frequency signal consistent with the intermodulation of two coexistent modes.

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Randy K. Dumas, Ezio Iacocca, Stefano Bonetti, Sohrab Sani, Majid Mohseni, Anders Eklund, Johan Persson, Olle Heinonen, Johan Åkerman. 2013-03-28. Spin wave mode coexistence on the nano-scale: A consequence of the Oersted field induced asymmetric energy landscape. https://doi.org/10.1103/physrevlett.110.257202

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