Significant improving magnetoelectric sensors performance based on optimized magnetoelectric composites via heat treatment

Abstract

Laminated magnetoelectric (ME) composites consisting of magnetostrictive and piezoelectric materials have been investigated and proved to realize strong ME coupling, which shows great benefits to fabricate high sensitivity ME magnetic sensors. In this work, optimized L-T mode ME composites consisting of heat-treated Metglas ribbons and [110]-oriented Mn-doped 0.71Pb(Mg 1/3 Nb 2/3 )O 3 -0.29PbTiO 3 (Mn-doped PMN-PT) single crystal fibers were reported, which achieves giant ME coupling and ultrahigh ME electric field coefficient of 4.26 × 10 4 V cm −1 Oe −1 at the electromechanical resonance. The equivalent magnetic noise of the ME sensor based on the proposed ME composites is only 2.89 fT Hz −1/2 at the electromechanical resonance, which exhibits great prospect in the application of precision magnetic field detection. Based on the characterization of heat-treated Metglas samples and the finite element simulation of the ME composites, the improved performance of the ME composites and ME sensors can be attributed to the enhanced properties of heat-treated Metglas (higher piezomagnetic coefficient d 33,m , higher induced magnetic flux density and lower mechanical loss) due to the enhancement of nanocrystallization and the stronger magnetic flux concentration effect corresponding to the dimension of the Metglas ribbons.

Self‐biased magnetoelectric composite for energy harvesting

“…Likewise, in a FeBSi/(Mn-PMNT)/FeBSi composite (FeBSi/Mn-doped 0.71Pb(Mg 1/3 Nb 2/3 )O 3 -0.29PbTiO 3 / FeBSi), fully annealed and heat-treated FeBSi alloys exhibited an obvious zero-field high q, with an ME charge coefficient of 750 pC Oe −1 at the f r of 15 kHz, which was higher than that of the unannealed structure (709 pC Oe −1 ). 119 S. Dong's group further explored the ME coupling effect of locally heat-treated Metglas/PMN-PT singlecrystal laminate composites. 65,120 The stress effect of the crystallinity and amorphous interface on the ME coupling was analyzed.…”

“…In the presence of a reverse magnetic field greater than 25 Oe, the magnetization of the annealed Metglas was clipped, thereby reducing the SME response. Likewise, in a FeBSi/(Mn–PMNT)/FeBSi composite (FeBSi/Mn‐doped 0.71Pb(Mg 1/3 Nb 2/3 )O 3 –0.29PbTiO 3 /FeBSi), fully annealed and heat‐treated FeBSi alloys exhibited an obvious zero‐field high q , with an ME charge coefficient of 750 pC Oe −1 at the f r of 15 kHz, which was higher than that of the unannealed structure (709 pC Oe −1 ) 119 …”

Теория Квазистатического Магнитоэлектрического Взаимодействия В Трехслойных Асимметричных Пьезомагнитострикционных Структурах

“…Весьма перспективным оказалось использование пьезомагнитострикционных композиционных материалов для создания преобразователей ток-напряжение (МЭ гираторов) [1][2][3], сборщиков энергии [4], высокочувствительных датчиков магнитного поля [5][6][7][8][9][10][11], электрически перестраиваемых катушек индуктивности [12]. Для получения максимального эффекта принципиальным остается вопрос повышения эффективности МЭ преобразования, особенно в области низких частот, где величина МЭ связи практически не зависит от частоты.…”

Physics of Composites for Low-Frequency Magnetoelectric Devices

“…The main characteristic of the ME composite in the case of a direct effect is the ME voltage coefficient, which is the ratio of the induced electric field to the alternating magnetic field acting on the composite. There are numerous works devoted to the calculation of individual characteristics of ME composites [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and examples of the development of various ME devices: sensors [21][22][23][24][25][26][27][28], gyrators [29,30], harvesters [31][32][33], antennas [34,35], and microwave devices [3,36]. The information in the literature concerns the calculations of the ME effect for individual electromechanical (EMR) regimes [6][7][8][9][10][11][12][13][14][15][16][17]…”

“…The information in the literature concerns the calculations of the ME effect for individual electromechanical (EMR) regimes [6][7][8][9][10][11][12][13][14][15][16][17][18][19], then further in the article we will carry the comparison of the obtained theoretical results with these data out. As an example of a developed perspective ME device, we can discuss the ME magnetic field sensor [22]. The great interest in this device is because, having a simple three-layer Metglas-PMN-PT-Metglas structure, in the near future it can replace a complex electronic device such as a SQUID operating at helium temperature, since comparable values for giant ME voltage coefficient of 4.26 × 10 4 V cm −1 Oe −1 and the equivalent magnetic noise of 2.89 fT Hz −1/2 at EMR frequency on this structure have already been achieved.…”