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|Title:||Giant magnetoelectric effect in magnet-cymbal-solenoid current-to-voltage conversion device|
Or, Derek Siu-wing
Chan, Helen L. W.
|Publisher:||American Institute of Physics|
|Source:||Journal of applied physics, 1 Apr. 2010, v. 107, no. 7, 074509, p. 1-4.|
|Abstract:||A giant magnetoelectric (ME) effect is reported in a current-to-voltage (I-to-V)conversion device formed by sandwiching a PZT piezoelectric cymbal transducer between an NdFeB magnet and a Fe-core solenoid. The observed ME effect results from the direct coupling of the electromagnetically induced attractive-repellent force effect in the magnet-solenoid assembly with the amplified piezoelectric effect in the cymbal transducer. The device exhibits a colossal I-to-V conversion factor (S) of 27.1 V/A with a giant ME coefficient (α[sub v]) of 1.24 V/Oe at a low resonance frequency of 2.33 kHz, besides a large S of 0.74 V/A with a high α[sub v] of 34 mV/Oe in the nonresonance frequency range of 40 Hz–1 kHz. A physical model based on the combination of electromagnetomechanics in the magnet-solenoid assembly and amplified piezoelectricity in the cymbal transducer is present to explain the observed ME effect and the resulting I-to-V conversion in the device.|
|Rights:||© 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in M. Zeng, S.W. Or & H.L.W. Chan. J. Appl. Phys. 107, 074509 (2010) and may be found at http://link.aip.org/link/?jap/107/074509|
|Appears in Collections:||AP Journal/Magazine Articles|
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