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Description
We present preliminary data measured in the multiferroic Y-type hexaferrite Ba1.3Sr0.7CoZnFe11AlO22 representing the time-resolved response of the crystal structure after short and intense THz excitation of an electromagnon. Electromagnons are emergent collective excitations that consist of optical phonons strongly coupled to magnons. It is believed that an electromagnon can alter the magnetic structure in multiferroics and thereby affect or switch the electric polarization. Employing time-resolved THz-pump x-ray diffraction carried out at the Bernina endstation (SwissFel, PSI), we characterized, for the first time, the structural dynamics accompanying the electronmagnon. Detailed interpretation of the acquired data may further hint at the alteration of the magnetic structure and hence polarization switching.
