期刊
JOURNAL OF APPLIED PHYSICS
卷 117, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4919047
关键词
-
资金
- Research Grants Council of the HKSAR Government [PF09-07842, PolyU 5228/13E]
A dc magnetoelectric sensor operating in ac voltage driving mode is developed based on a piezoelectric-magnetostrictive heterostructure having four thickness-polarized Pb(Zr, Ti)O-3 piezoelectric plates bonded symmetrically on a length-magnetized Tb0.3Dy0.7Fe1.92 magnetostrictive plate to give an electrically parallel input and an electrically series output. The dc magnetic field sensing in the sensor is evaluated theoretically and experimentally and is found to originate from a unique ac voltage-driven, dc magnetic field-tuned resonance dc magnetoelectric effect in the heterostructure. An interestingly high, linear, and negative ac voltage-controlled dc magnetic field sensitivity of 1.3 mV/Oe/V is obtained in a broad range of dc magnetic field of 0-400Oe by referencing an ac voltage of <= 5V peak amplitude and 116 kHz frequency at the input of the heterostructure. (C) 2015 AIP Publishing LLC.
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