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The magnetoelectric (ME) antenna based on the piezoelectric resonance principle can address the problems of large size and high power consumption of traditional low-frequency electrical antennas. However, the acoustic impedance mismatch between the adhesive layer in the magnetoelectric composite and the piezoelectric and ferromagnetic phases significantly hinders the stress transfer during the magneto-mechanicalelectric coupling process, ultimately limiting the magnetic radiation intensity of the magnetoelectric composite. To enhance the magnetic emission performance of the PZT MFC/Metglas magnetoelectric composite, this paper selects the two-dimensional filler MoS2 to fill and modify the adhesive layer of the PZT MFC/Metglas magnetoelectric composite, aiming to increase the acoustic impedance matching between the adhesive layer and the ferroelectric and ferromagnetic phases. The influence of the MoS2 content on the magnetic emission intensity of the PZT MFC/Metglas magnetoelectric composite has been systematically studied. The results show that when the filling content of MoS2 is 1 wt%, the magnetic emission intensity of the PZT MFC/Metglas magnetoelectric composite can reach 331 µT under the optimal bias, which is 1.5 times higher than that of the magnetoelectric composite without MoS2 filling. At a distance of 1 m, the magnetic emission intensity can reach 2.7 nT. Combined with the acoustic impedance matching theory, the stress wave transfer mechanism in the electro-mechanical-magnetic coupling has been discussed. In addition, through the amplitude shift keying (ASK) modulation method, the lossless signal transmission capability of the magnetoelectric antenna made of the MoS2-modified PZT MFC/Metglas magnetoelectric composite has been demonstrated. This method of optimizing the interfacial adhesive layer presents a simple and effective approach to expand the magnetoelectric response by increasing the stress wave transfer efficiency. Meanwhile, it provides a feasible solution for communication systems such as low-frequency underwater communication, underground sensing, and distributed wireless networks.
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Keywords:
- PZT MFC/Metglas magnetoelectric composite /
- Magnetic emission intensity /
- Stress transfer /
- Acoustic impedance
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