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Microwave assisted magnetization reversal in single domain nanoelements



Hans T. Nembach, Hans Bauer, Justin M. Shaw, Michael Schneider, Thomas J. Silva


We studied the microwave assisted magnetic reversal in 65×71 nm2 elliptical Ni80Fe20 nanomagnets with a thickness of 10 nm. Hysteresis curves were measured by magneto-optical Kerr effect for a range of microwave frequencies and amplitudes. We observe a strong reduction in the coercive field when the microwave frequency coincides with the experimentally determined ferromagnetic resonance frequency in the switching region. This process occurs despite a small microwave amplitude relative to the coercive field. The experimental results were compared to numerical simulations and show good agreement.
Applied Physics Letters


nanomagnetics, magnetic recording, microwave assisted magnetic reversal, magnetic switching, energy assisted magnetic reversal


Nembach, H. , Bauer, H. , Shaw, J. , Schneider, M. and Silva, T. (2009), Microwave assisted magnetization reversal in single domain nanoelements, Applied Physics Letters, [online], (Accessed May 18, 2024)


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Created July 6, 2009, Updated February 19, 2017