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arXiv · 1610.03391

Control of the Oscillatory Interlayer Exchange Interaction with Terahertz Radiation

Uta Meyer·Geraldine Haack·Christoph Groth·Xavier Waintal
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Abstract

The oscillatory interlayer exchange interaction between two magnetic layers separated by a metallic spacer is one of the few coherent quantum phenomena that persist at room temperature. Here we show that this interaction can be controlled dynamically by illuminating the sample (e.g. a spin valve) with radiation in the 10-100 THz range. We predict that the exchange interaction can be changed from ferromagnetic to anti-ferromagnetic (and vice versa) by tuning the amplitude and/or the frequency of the radiation. Our chief theoretical result is an expression that relates the dynamical exchange interaction to the static one that has already been extensively measured.

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Uta Meyer, Geraldine Haack, Christoph Groth, Xavier Waintal. 2016-10-11. Control of the Oscillatory Interlayer Exchange Interaction with Terahertz Radiation. https://doi.org/10.1103/physrevlett.118.097701

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