Enhancement of Gyration Effects by Dysprosium-Doped Ferrite/Piezoelectric Magnetoelectric Gyrators

A beneficial methodology of heavy rare earth dysprosium doping in spinel nickel-zinc ferrites host lattice for improving the gyration effects of magnetoelectric (ME) gyrators was presented, and the physical and magnetic properties of synthesized ferrites, dynamic magneto-mechanical responses, and non-reciprocal current–voltage conversions and power conversion efficiency were systematically characterized. Taking advantage of the strong magneto-crystalline anisotropy of dysprosium-induced large lattice distortions, piezo-magnetic coefficient can be improved effectively and eventually the PE. Experimental results demonstrated that the maximum
$V/I$
and
$I/V$
coefficients are 1609 V/A and 4.2 mA/V at optimum dysprosium concentration of
$x = 0.4$
, which are 165% and 122% times higher than that in samples without rare earth doping, respectively. These finding provided great possibilities to advance this presented method and optimized ME gyrators into actual applications as energy efficient
$I$
–
$V$
converters for power electronics.