Экспериментально обнаружен и исследован эффект преобразования спектра магнитного шума в планарной магнитоэлектрической структуре Metglas--цирконат-титанат свинца--Metglas. Показано, что узкополосный шум с центральной частотой fN приводит к линейной генерации шумового электрического напряжения на частоте шума и нелинейной генерации шумового напряжения вблизи нулевых частот и в области удвоенной частоты шума. Эксперимент хорошо объясняется теорией смешения магнитных полей в магнитоэлектрических композитах c нелинейной зависимостью магнитострикции ферромагнетика от поля. DOI: 10.21883/PJTF.2017.18.45040.16905

Parametric amplification of magnetoacoustic oscillations was observed in a disk resonator containing a ferromagnetic layer of FeBSiC and a piezoelectric layer of lead zirconate-titanate. Oscillations with a frequency of 3.08 kHz were excited and recorded using two coils with orthogonal axes. Pumping was performed by an electric field with a double frequency applied to the piezoelectric layer. The amplification of vibrations arises due to a change in the rigidity of the structure under influence of an electric field. It is shown that the gain can be changed using a permanent bias magnetic field applied to the structure.

Письма в ЖТФ, 2020, том 46, вып. 10 26 мая 05.2

A high-frequency magnetoelectric (ME) effect has been discovered in a planar structure containing a ferromagnetic FeCoSiB layer and a piezoelectric AlN layer produced by magnetron sputtering on a borosilicate glass substrate. The structure was excited by a magnetic field at a frequency of the thickness acoustic vibration mode of 32.4 MHz, and the electric voltage generated by the piezoelectric layer was measured. The coefficient of ME conversion at the frequency of the second thickness mode is αE ≈ 19 V / A at a bias magnetic field of 120 A / m, corresponding to the maximum of the piezomagnetic coefficient of the ferromagnetic layer.