Microstructure–property relationship in magnetoelectric bulk composites

Sheikh, Arif D.; Fawzi, Abdulsamee; Mathe, V. L.

doi:10.1016/j.jmmm.2010.10.038

Cited by 21 publications

(7 citation statements)

References 28 publications

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“…Whereas, the maximum value of ME coefficient is obtained for x = 0.30 composite (i.e., 1.45 mV cm -1 Oe -1 ), which is higher to those obtained in similar type of ME system in literature [14,[29][30][31][32]. However, the observed variation in the ME coefficient with CFO content is related with the connectivity between the CFO and PZT grains [33,34]. As seen from the SEM images (Fig.…”

Section: Resultsmentioning

confidence: 50%

Magnetic, dielectric and magnetoelectric properties in (1 − x)Pb(Zr0.52Ti0.48)O3 + (x)CoFe2O4 composites

Atif

Nadeem

Größinger

et al. 2015

J Mater Sci: Mater Electron

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Multiferroic composites of (1 -x)PbZr 0.52-Ti 0.48 O 3 ? (x)CoFe 2 O 4 with x = 0.0, 0.15, 0.30, 0.45 and 1.0 are synthesized by using ball milling method. Rietveld refinement of XRD patterns confirmed the single phase formation in x = 0.0 and x = 1.0 and two distinct phase formation in x = 0.15, 0.30 and 0.45 composites. SEM images explored the effect of CFO content on the grain connectivity of each phase in the prepared composites.The dielectric properties showed dielectric dispersion with increasing frequency due to interfacial polarization; whereas the dielectric constant is found to increase with increasing CFO content which is attributed to the space charge effect. AC conductivity analysis suggested the mixed polaron hopping type of conduction mechanism. Magnetic hysteresis loops exhibited ferromagnetic like behaviour, indicating the presence of ordered magnetic structure in the prepared composites. Furthermore, with increasing CFO content, the saturation magnetization, magnetostriction and strain sensitivity is found to be increased which in turn have a significant effect on the magnetoelectric coefficient. The maximum magnetoelectric coefficient of 1.45 mV cm -1 Oe -1 is obtained for x = 0.30 composite. Here, the observed variation in the magnetoelectric coefficient is correlated with the microstructure as well as the amount of CFO content.

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Section: Resultsmentioning

confidence: 50%

Magnetic, dielectric and magnetoelectric properties in (1 − x)Pb(Zr0.52Ti0.48)O3 + (x)CoFe2O4 composites

Atif

Nadeem

Größinger

et al. 2015

J Mater Sci: Mater Electron

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“…Recently, polycrystalline magnetostrictive alloys with a combination of high stiffness and strength and large magnetostriction have become desirable for various smart applications, such as energy harvesters and microscale sensors and actuators . However, the current understanding of the microstructure–property relationship of magnetostrictive materials is still limited dueto the complexity of their grain geometry, multi‐objective design requirements, and the lack of experimental verifications …”

Section: Introductionmentioning

confidence: 99%

Microstructure‐Enhanced Inverse Magnetostrictive Effect in Fe–Co Alloy Wires

et al. 2020

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Vibratory power generation technology using the inverse magnetostriction effect, which is a magnetic flux change induced by stress, in ferromagnetic materials has attracted significant attention. Recently, polycrystalline magnetostrictive alloys with a combination of high stiffness and strength and large magnetostriction have become desirable for various smart applications, such as energy harvesters [1] and microscale sensors [2] and actuators. [3] However, the current understanding of the microstructure-property relationship of magnetostrictive materials is still limited due to the complexity of their grain geometry, multi-objective design requirements, and the lack of experimental verifications. [4,5] In 1965, Clark et al. [6] reported that Tb-Dy-Fe alloy (Terfenol-D) exhibits excellent magnetostriction (%1600 ppm), a large generated force (%30 000 N), and high responsiveness (%40 μs). Magnetostrictive alloys have been widely used as actuators, but the scope of engineering applications is limited because of the brittleness in Terfenol-D. In 2000, Fe-Ga-Al alloy (Galfenol) attracted attention for its excellent magnetostrictive properties and rigidity. [7-10] Many studies focus on the addition of third elements or controlling the nanostructure. Wu et al. [11] reported that the addition of the rare-earth element Tb exhibited large magnetostriction (400 ppm) and good strength (400 MPa). Recently, Na et al. [12] developed Fe-Al alloy (Alfenol) with a strong <100> orientation in the roll direction that showed good magnetostriction (%200 ppm) and tensile strength (606 MPa). Thus, it is speculated that the magnetostriction and mechanical properties of magnetostrictive materials show a contradictory relationship; that is, there are some difficulties in improving both characteristics simultaneously. Mashiyama [13] and Furuya et al. [14] found that Co-rich Fe 1-x Co x alloys (x ¼ 50-90 at%) have excellent magnetostrictive and mechanical properties. [15-18] Yamaura et al. [19] demonstrated larger magnetostriction of 128 ppm along the rolling direction in an Fe 25 Co 75 alloy by cold rolling (rolling rate of %97%) compared with the other composition in Fe-Co system. These Co-rich Fe-Co alloys have been gradually used commercially because they are easy to transform into any shape for applications. [20-25] Thus, the composition of Fe 29 Co 71 seems to be superior to the other composition in the viewpoint of magnetostrictive and mechanical characteristics in Fe-Co system. [13,19] These characteristics are preferred to be the applications of mechanical sensors or energy harvesters assumed in an industrial environment.

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“…Recently the development of methods of preparation magnetolelctric composite based with nanoscale of particle and crystallite size being done. There are other routes for the synthesis of magnetoelectric materials such as chemical solution deposition [11], sol-gel technique [12] and conventional solid-state sintering technique [13][14][15]. However, the high-energy ball milling (e.g.…”

Section: Introductionmentioning

confidence: 99%