Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4867889
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Funding
- State Key Development Program (973 Program) for Basic Research of China [2013CB228206]
- National Natural Science Foundation of China [51077085]
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The magnetic energy harvesting properties of piezoelectric bimorph/magnet composite are studied in this Letter. The devices are fabricated with NdFeB magnets and piezofiber (d33 mode), whose magnetoelectric (ME) coefficient reaches 526 V/cm.Oe (RMS) at the resonant frequency (27.3Hz), and the maximum power density of which is 38.8 mW/cm(3) at 9.78 Oe. Factors influencing the magnetoelectric property of the piezoelectric/magnet composite are discussed, which might guide further enhancement of its energy harvesting ability. This particular ME composite possesses far better energy harvesting abilities than magnetostrictive/piezoelectric composites, able to scavenge energy from power-frequency magnetic fields to support wireless sensor network. (C) 2014 AIP Publishing LLC.
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