Schematic diagram showing a NFO-PZT bilayer on a strontium titanate substrate. Directions 1, 2, and 3 are along the -, -, and -axes, respectively. An ac magnetic field and a bias magnetic field are assumed along the direction 1 and the resultant ac electric field along the direction 3.
Low-frequency ME voltage coefficient as a function of a bilayer of NFO and PZT on STO substrate. The PZT volume fraction dependence of is shown as a function of substrate-to-bilayer thickness ratio .
Comparison of ME voltage coefficient vs based on the current model and the previous model of Ref. 14 that ignores the bending strain. Results are for a PZT volume fraction of 0.6.
Frequency dependence of ME voltage coefficient for the freestanding bilayer of NFO and PZT with a length of 12 mm, a thickness of 100 nm, and a PZT volume fraction of 0.5.
PZT volume fraction dependence of peak ME voltage coefficient at bending mode and EMR frequency for the freestanding NFO-PZT bilayer. The points are estimated values and the lines are guide to the eyes.
Dependence of peak ME voltage coefficient at bending mode and corresponding EMR frequency on the ratio of substrate thickness to bilayer thickness are presented for a PZT volume fraction of 0.6. The points are estimated values and the lines are guide to the eyes.
Material parameters (compliance coefficient , piezomagnetic coupling , piezoelectric coefficient , and permittivity ) for NFO, PZT, and used for theoretical estimates.
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