Experimental demonstration and operating principles of a multiferroic antenna
| Autor: | David W. Shahan, Zhi Jackie Yao, Joseph D. Schneider, Sidhant Tiwari, Skyler Selvin, John Domann, Yuanxun Ethan Wang, Geoff McKnight, Gregory P. Carman, Rob N. Candler, Paymon Shirazi, Walter S. Wall, Casey J. Sennott, Mohanchandra K. Panduranga |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Demagnetizing field General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Signal Piezoelectricity Magnetic flux Magnetic field Condensed Matter::Materials Science Magnetization 0103 physical sciences Antenna (radio) 0210 nano-technology Voltage |
| Zdroj: | Journal of Applied Physics. 126:224104 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | This paper experimentally demonstrates the operating principles of a near-field multiferroic antenna. The antenna uses a piezoelectric lead-zirconate-titanate stack to apply a time varying strain to a magnetoelastic iron gallium Fe80.77Ga19.23 (FeGa) rod. The voltage induced strain controls the net magnetization of the FeGa rod to generate oscillating magnetic fields in free space surrounding the antenna. Direct experimental measurements of the mechanical force, strain, magnetic field, and magnetic flux inside the FeGa rod were collected and show a strong correlation with the dynamic magnetic field measured in free space. Additionally, an analytical dipole model is used to demonstrate that the free space signal originates from the changing magnetization in the FeGa rod, providing a clear multiferroic antenna proof-of-concept demonstration. Finally, analysis is provided to highlight the importance of device geometry and demagnetization fields when optimizing the antenna response. |
| Databáze: | OpenAIRE |
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