Energy Harvesting

Boughey, Chess; Kar‐Narayan, Sohini

doi:10.1002/9783527801336.ch6c

Cited by 3 publications

(1 citation statement)

References 115 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In typical homes, the 50 / 60 Hz electromagnetic radiation which emanates from wiring can reach 0.01 Gauss -10 Gauss 3 and in industrial locations with heavy electrical machinery, the magnetic field strength may even exceed 100 Gauss 3 . At the same time, there is a need for efficient and costeffective sensors that are sensitive to small magnetic fields, for applications as diverse as medical devices, communications and even power electronics 4 . Magnetoelectric (ME) devices provide an attractive route to achieving the above due to their ability to inter-convert magnetic and electric signals.…”

Section: Introductionmentioning

confidence: 99%

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

Boughey

Calahorra

Datta

et al. 2018

ACS Appl. Nano Mater.

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%