Magnetostrictive particulate actuators: configuration, modeling and characterization

Anjanappa, M.; Wu, Yuefei

doi:10.1088/0964-1726/6/4/002

Cited by 58 publications

(32 citation statements)

References 7 publications

(9 reference statements)

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“…It has been shown that magnetostriction is a quadratic function of M, i.e., λ ∝ M 2 [1][2][3]. Today, magnetostrictive materials are used in actuators [4,5], sonar transducers [6], motors [7], and various types of sensors [8,9]. The interest in oxide-based magnetostrictive materials such as cobalt ferrites (CFOs) has also increased due to their low cost, ease of fabrication, high resistivity, and high mechanical robustness compared to rare-earth intermetallics like Terfenol-D [10].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

et al. 2018

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Applications of magnetostrictive materials commonly involve the use of the dynamic deformation, i.e., the piezomagnetic effect. Usually, this effect is described by the strain derivative ∂λ=∂H, which is deduced from the quasistatic magnetostrictive curve. However, the strain derivative might not be accurate to describe dynamic deformation in semihard materials as cobalt ferrite (CFO). To highlight this issue, dynamic magnetostriction measurements of cobalt ferrite are performed and compared with the strain derivative. The experiment shows that measured piezomagnetic coefficients are much lower than the strain derivative. To point out the direct application of this effect, low-frequency magnetoelectric (ME) measurements are also conducted on bilayers CFO=PbðZr; TiÞO 3 . The experimental data are compared with calculated magnetoelectric coefficients which include a measured dynamic coefficient and result in very low relative error (<5%), highlighting the relevance of using a piezomagnetic coefficient derived from dynamic magnetostriction instead of a strain derivative coefficient to model ME composites. The magnetoelectric effect is then measured for several amplitudes of the alternating field H ac , and a nonlinear response is revealed. Based on these results, a trilayer CFO/PbðZr; TiÞO 3 /CFO is made exhibiting a high magnetoelectric coefficient of 578 mV=A (approximately 460 mV=cm Oe) in an ac field of 38.2 kA=m (about 48 mT) at low frequency, which is 3 times higher than the measured value at 0.8 kA=m (approximately 1 mT). We discuss the viability of using semihard materials like cobalt ferrite for dynamic magnetostrictive applications such as the magnetoelectric effect.

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Section: Introductionmentioning

confidence: 99%

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

et al. 2018

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“…Giant magnetostrictive materials based on (Tb,Dy)Fe 2 compound can be used in acoustic transducers, sensors and actuators because of their huge magnetostriction [1][2][3]. Considerable work has been done to improve the magnetostriction and extend the operating temperature range by partly substituting other rare earth elements for Tb or Dy, or other transition metals for Fe [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Magnetostriction of 〈110〉 oriented crystals in Tb0.36Dy0.64(Fe1−xCox)2 (x = 0–0.30) alloys

Jiang

et al. 2005

Journal of Alloys and Compounds

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“…An insulating layer created by the matrix between particles increases the electric resistance and reduces eddy current losses at high frequencies. Moreover, the composite form is substantially tougher and easier to manufacture than the monolith [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%