We review the development trends in microwave magnetism and superconductivity over the last five decades. The review contains the key results of recent studies related to the promising areas of modern magnetism and applied physics – spintronics, magnonics, magnon caloritronics, physics of magnonic crystals, spin-wave logic, and the development of novel micro- and nano-scale magnetic devices. The main achievements in these fields of physics are summarized and generalized.

This report is on the synthesis by electrospinning of multiferroic core-shell nanofibers of strontium hexaferrite and lead zirconate titanate or barium titanate and studies on magneto-electric (ME) coupling. Fibers with well-defined core-shell structures showed the order parameters in agreement with values for nanostructures. The strength of ME coupling measured by the magnetic field-induced polarization showed the fractional change in the remnant polarization as high as 21%. The ME voltage coefficient in H-assembled films showed the strong ME response for the zero magnetic bias field. Follow-up studies and potential avenues for enhancing the strength of ME coupling in the core-shell nanofibers are discussed.

It is demonstrated that non-resonant (ωs = ωp/2) wave front reversal (WFR) of spin-wave pulses (carrier frequency ωs) caused by pulsed parametric pumping (carrier frequency ωp) can be effectively used for microwave signal processing. When the frequency band Ωp of signal amplification by pumping is narrower than the spectral width Ωs of the signal (Ωp ≪ Ωs), the non-resonant WFR can be used for the analysis of the signal spectrum. In the opposite case (Ωp ≫ Ωs) the non-resonant WFR can be used for active (with amplification) filtering of the input signal.

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