Magnetoelectric coupling in Y-type hexaferrite studied by a novel magnetic resonance technique

Magnetoelectric materials with coupled and microscopically coexisting magnetic and electric polarizations have attracted great interest. The motivation behind this interest stems from the novel and interesting physical phenomena involved, but also from possible applications for novel electronic devices. Here we demonstrate the existence of magnetoelectric coupling at room temperature in ferrimagnetic Y-type hexaferrite Ba0.6Sr1.4Zn2Fe12O22 single crystal. By using a recently developed electrically modulated magnetic resonance spectroscopy, we determined quantitatively the magnetoelectric coupling strength in this compound. Obtained results show that Y-type hexaferrites belong to the rare class of materials with significant magnetoelectric coupling and large magnetic moment at room temperature.