Influence of particle pre-orientation on elastomagnetic effect in a composite material of ellipsoidal Ni microparticles in a silicone matrix

Lanotte, L.; Ausanio, G.; Iannotti, V.; Luponio, C.

doi:10.1007/s00339-002-1939-x

Cited by 27 publications

(23 citation statements)

References 6 publications

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“…In particular, the inverse elastomagnetic effect is exhibited: strain appears when its state of magnetization is changed, due to the alignment or rotation of magnetic particles and it is not depending on the intrinsic magnetostriction of the particles [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Magneto-piezoresistivity in iron particle-filled silicone: An alternative outlook for reading magnetic field intensity and direction

Iannotti¹,

Ausanio²,

Lanotte³

2016

Express Polym. Lett.

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Abstract. Elastomagnetic effect (strain induced by magnetic field application) and piezoresistivity (change of electron conductivity due to an induced strain) are coupled in composite materials constituted by magnetic and conductive microparticles into an elastic matrix. On the basis of these effects, the principle of a new method to read magnetization direction changes, in a random sequence, is proposed and experimentally demonstrated. We have produced new composite magnetopiezoresistive samples, constituted of thin chip shaped Fe microparticles inside a silicone matrix, which under an applied magnetic field along their longitudinal axis, undergo an induced strain depending on the local magnetization direction. The resulting resistivity change can be easily detected and used to deduce the local magnetization direction. The magnetization and strain processes are reversible so that after the removal of external magnetizing field the sample is ready for new measurements. A demonstrator prototype has been conceived, produced and tested. The experimental results provide interesting data encouraging to continue the research towards nano-scale devices in order to pursue the intriguing perspective to achieve a magnetic field gradient sensitivity able to reveal magnetization of semipermanent nanomagnets, polarized 'up' and 'down'.

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Section: Introductionmentioning

confidence: 99%

Magneto-piezoresistivity in iron particle-filled silicone: An alternative outlook for reading magnetic field intensity and direction

Iannotti¹,

Ausanio²,

Lanotte³

2016

Express Polym. Lett.

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“…The importance of particle preorientation on the magnetization-strain coupling was also already studied [2]. In this paper, we investigate another important issue: the role of the particle size in determining both the magnetic and elastomagnetic behaviour of this kind of composite materials.…”

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confidence: 98%

“…The magnetic behaviour of the composite materials was investigated by vibrating sample magnetometry (VSM), while for studying the inverse elastomagnetic effect the samples were strained during VSM characterization using a simple mechanical device [1,2] that enables controlled longitudinal strain e z .…”

mentioning

confidence: 99%

“…The commercial powder was selected in dimension using chemical filter paper, whereas the dimension of the nano-particles obtained in laboratory was controlled by operating on the chemical process parameters and subsequent centrifugation. After the production process [1,2], the material was cut obtaining a final shape of parallelepiped (2 Â 2 Â 4 mm 3 ). The analysis of (a) kind Ni particles was performed by scanning electron microscopy (SEM) [1].…”

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confidence: 99%

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Particle dimension effects on magnetization and strain sensitivity for a composite of nickel particles in silicone matrix

Lanotte¹,

Ausanio²,

Hison³

et al. 2004

Journal of Magnetism and Magnetic Materials

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“…This kind of composite material represents the ideal system for the coupling mechanism between elastic deformation and magnetization that was recently discovered and named elastomagnetic effect [1,2]. In particular, for relative linear deformations up to about 15% the new material exhibits both good elastic characteristics and important magnetoelastic effects not ascribed to intrinsic magnetostriction, but due to the strong coupling between particles rotation and rotation of their permanent magnetic moments.…”

mentioning

confidence: 98%

Elastomagnetic effect in novel elastic magnets

Ausanio

Hison

Iannotti

et al. 2004

Journal of Magnetism and Magnetic Materials

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Influence of particle pre-orientation on elastomagnetic effect in a composite material of ellipsoidal Ni microparticles in a silicone matrix

Cited by 27 publications

References 6 publications

Magneto-piezoresistivity in iron particle-filled silicone: An alternative outlook for reading magnetic field intensity and direction

Magneto-piezoresistivity in iron particle-filled silicone: An alternative outlook for reading magnetic field intensity and direction

Particle dimension effects on magnetization and strain sensitivity for a composite of nickel particles in silicone matrix

Elastomagnetic effect in novel elastic magnets

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