Open AccessVoltage-mode direct-current magnetoelectric sensor based on piezoelectric–magnetostrictive heterostructure
Author(s) -
Long Zhang,
Siu Wing Or,
Chung Ming Leung
Publication year - 2015
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.4919047
Subject(s) - magnetostriction , materials science , heterojunction , piezoelectricity , voltage , magnetic field , magnetoelectric effect , optoelectronics , direct current , nuclear magnetic resonance , electrical engineering , ferroelectricity , physics , composite material , multiferroics , quantum mechanics , dielectric , engineering
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)O3 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 0-400 Oe by referencing an ac voltage of ?5 V peak amplitude and 116 kHz frequency at the input of the heterostructure.Department of Electrical Engineerin
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom