Magnetoelectric Composites for Bionics Applications

Zheng, Tian; Zong, Yan; Yue, Zhilian; Wallace, Gordon G.; Higgins, Michael J.

doi:10.1002/9783527801336.ch6b

Cited by 4 publications

(5 citation statements)

References 101 publications

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“…33 In the coaxial structure, there is an additional advantage; the thin piezoelectric shell can absorb all or most of the magnetostrictive stress rather than just the interfacial layer, which typically occurs in bulk ME composites, and also there is no substrate clamping. 34 This is also true for other core−shell structures. The polymeric nature of the NWs used here also offers a further increase in flexibility and robustness compared to nonpolymeric piezoelectric materials and is suitable for facile low-temperature, low-pressure, solution-processable fabrication techniques.…”

Section: ■ Introductionmentioning

confidence: 78%

“…ME composite NWs are more sensitive to low amplitude vibrations, have reduced fragility and increased flexibility and the increased interfacial surface area in contact between the two phases increases the strain coupling and therefore the ME coupling 33 . In the coaxial structure there is an additional advantage; the thin piezoelectric shell can absorb all or most of the magnetostrictive stress rather than just the interfacial layer which typically occurs in bulk ME composites, and also there is no substrate clamping 34 . This is also true for other core-shell structures.…”

Section: Introductionmentioning

confidence: 99%

“…35 Studies on the converse ME effect exist in bulk samples, where MFM is used to image magnetic domains before and after electrical poling with the conductive AFM tip on bulk (3−3) composites. 34 Bai et al 37 measured (1−3) composites also in the same way except they added a preliminary step to reduce electrostatic interactions encountered during the measurement, which can interfere with any magnetic field of the electrical signals being measured. They measured α 33 C to be 4.9 × 10 −9 s m −1 on CFO−BFO (1−3) composites.…”

Section: ■ Introductionmentioning

confidence: 99%

“…An external magnetic field from a permanent magnet is used to trigger a ME response in the composites, and the piezoelectric response is measured before and after this process. ,, Some of these studies are on (1–1) core–shell CFO–BFO and CFO–PZT NWs . Studies on the converse ME effect exist in bulk samples, where MFM is used to image magnetic domains before and after electrical poling with the conductive AFM tip on bulk (3–3) composites . Bai et al measured (1–3) composites also in the same way except they added a preliminary step to reduce electrostatic interactions encountered during the measurement, which can interfere with any magnetic field of the electrical signals being measured.…”

Section: Introductionmentioning

confidence: 99%

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Coaxial Nickel–Poly(vinylidene fluoride trifluoroethylene) Nanowires for Magnetoelectric Applications

Boughey

Calahorra

Datta

et al. 2018

ACS Appl. Nano Mater.

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Magnetoelectric (ME) composite materials, in which the coupling between magnetostricitve and piezoelectric effects is achieved, are potential candidates for multifunctional devices where the interplay between electrical, magnetic and mechanical properties of these structures can be fully exploited. Nanostructured composites are particularly interesting due to the enhancement of ME coupling expected at the nanoscale. However, direct studies of ME coupling in nanocomposites by scanning probe techniques are rare due to the complex interplay of forces at play, including those arising from electrostatic, magnetic and electromechanical interactions. In this work, the ME coupling of coaxial nickel-polyvinylidene fluoride trifluoroethylene [Ni-P(VDF-TrFE)] composite nanowires, fabricated by a scalable template-wetting based technique, is studied using a systematic sequence of scanning probe techniques. Individual ME nanowires were subjected to an electric field sufficient for ferroelectric poling in piezoresponse force microscopy (PFM) mode, while magnetic force microscopy (MFM) was used 2 to measure localised changes in magnetization as a result of electrical poling. Kelvin probe force microscopy (KPFM) measurements of surface potential were conducted to eliminate for the effect of contact potential differences during these measurements. An inverse, static, magnetoelectric coupling coefficient of ~1 x 10-11 s m-1 was found in our coaxial nanocomposite nanowires, comparable to other types of planar composites studied in this work, despite having an inferior piezoelectric-to-magnetostrictive volume ratio. The efficient ME coupling in our coaxial nanowires is attributed to the larger surface-to-volume interfacial contact between Ni and P(VDF-TrFE), and is promising for future integration into ME composite devices such as magnetic field sensors or energy harvesters.

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Section: ■ Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Coaxial Nickel–Poly(vinylidene fluoride trifluoroethylene) Nanowires for Magnetoelectric Applications

Boughey

Calahorra

Datta

et al. 2018

ACS Appl. Nano Mater.

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“…These kind of alloys have been extensively employed with piezoelectric materials, making use of the coupling between magnetostrictive and piezoelectric phases [24][25][26][27][28]. This coupling gives rise to the fabrication of the so called magnetoelectric (ME) laminated composites, which have been used in a wide range of applications such as magnetic field sensors [29], high power converters [30] or biomedical applications [31,32], among others. However, the exploration of magnetostrictive materials with piezo-ionic composites has not been carried out yet.…”

Section: Introductionmentioning

confidence: 99%

Development of novel piezo-ionic/magnetostrictive composites for energy generation systems

Lasheras

Saiz

Gutiérrez

et al. 2020

Smart Mater. Struct.

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Novel piezo-ionic/magnetostrictive bi-layer composites for new energy generation devices are presented. These structures, fabricated with Metglas ® 2826MB ferromagnetic alloys and ionic liquid based PVDF-HFP polymer composites, show an induced electric response as a consequence of the coupling between the magnetostrictive properties of the Metglas ® 2826MB and the piezo-ionic ones of the ionic liquid based PVDF-HFP polymer composites. These flexible, simple and low cost structures do not need to be polarized to exhibit an electric response, and show an increased induced voltage as the percentage of the ionic liquid in the PVDF-HFP matrix does. This response is a consequence of the asymmetric deformation caused by the magnetostrictive material on the piezo-ionic composite, which induces a non-uniform distribution of the cations and anions in the polymer matrix. The laminates present a maximum response under the application of a low magnetic fields of 9 Oe, and a normalized magneto-ionic coefficient values up to 550 mV cm −1 .Oe for the structure with an ionic liquid content of 30 %. These values are even higher than others obtained with piezoelectric materials based ME composites. The simple fabrication process and potentiality of these new piezo-ionic/magnetostrictive laminates contributes to broaden and improve the state of the art of the energy generation systems.

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Magnetostrictive polymer composites: Recent advances in materials, structures and properties

Elhajjar

Law

Pegoretti

2018

Progress in Materials Science

113

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Magnetoelectric Composites for Bionics Applications

Cited by 4 publications

References 101 publications

Coaxial Nickel–Poly(vinylidene fluoride trifluoroethylene) Nanowires for Magnetoelectric Applications

Coaxial Nickel–Poly(vinylidene fluoride trifluoroethylene) Nanowires for Magnetoelectric Applications

Development of novel piezo-ionic/magnetostrictive composites for energy generation systems

Magnetostrictive polymer composites: Recent advances in materials, structures and properties

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