Ni microparticles were homogeneously dispersed into a silicone matrix preventing their direct contact even at volume fractions near the percolation threshold. In this condition, owing to the co-presence of elastomagnetic and piezoresistive effects, a moderate gradient of an external magnetizing field induces an electron conduction increment higher than 60% in Ni-silicone elastomagnetic composites. This demonstrates a peculiar kind of magnetoresistance mechanism that we define as “magneto-piezoresistance.” Theoretical predictions and validating experiments of this effect are reported. Owing to its innovative nature and potential improvements, the magneto-piezoresistance opens new perspectives for the elastomagnetic composites application in microdevices such as atomic force microscope tips and magnetic lecture heads.

Magneto-piezoresistance in elastomagnetic composites

AUSANIO, GIOVANNI;IANNOTTI, VINCENZO;LANOTTE, LUCA;LANOTTE, LUCIANO
2011

Abstract

Ni microparticles were homogeneously dispersed into a silicone matrix preventing their direct contact even at volume fractions near the percolation threshold. In this condition, owing to the co-presence of elastomagnetic and piezoresistive effects, a moderate gradient of an external magnetizing field induces an electron conduction increment higher than 60% in Ni-silicone elastomagnetic composites. This demonstrates a peculiar kind of magnetoresistance mechanism that we define as “magneto-piezoresistance.” Theoretical predictions and validating experiments of this effect are reported. Owing to its innovative nature and potential improvements, the magneto-piezoresistance opens new perspectives for the elastomagnetic composites application in microdevices such as atomic force microscope tips and magnetic lecture heads.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/399727
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