Localized strain profile in surface electrode array for programmable composite multiferroic devices

Abstract

We investigate localized in-plane strains on the microscale, induced by arrays of biased surface electrodes patterned on piezoelectrics. Particular focus is given to the influence that adjacent electrode pairs have on one another to study the impact of densely packed electrode arrays. We present a series of X-ray microdiffraction studies to reveal the spatially-resolved micron-scale strain distribution. The strain maps with micron-scale resolution highlight how the local strain

Magnetic state switching in FeGa microstructures

“…This ability to switch off the magnetization in magnetoelectric composite heterostructures on the 10's micron length scale is anticipated to be useful in biomedical and biotechnology applications where cells tagged with magnetic particles can be captured by the remanent magnetization (> 0.5 𝑀𝑀 𝑠𝑠 ) and released upon localized application of electric field [17,18,22]. This quasi-static electric field driven magnetic state switching can be exploited in the design of multiferroic composites with localized electrodes where non-linear strains > 2000 ppm or electric fields > 0.4 MV/m are not available [7,8,37].…”

Deterministic domain wall rotation in a strain mediated FeGaB/PMN-PT asymmetrical ring structure for manipulating trapped magnetic nanoparticles in a fluidic environment

“…The strain distribution in piezoelectric with fully covered top and bottom electrodes (two-electrode system) relies on piezoelectric coefficients. 63 As already described in Section 3.3, we have considered a single crystal PMN-PT piezoelectric substrate with spontaneous polarization along h111i direction. With fully covered two electrodes, its h011i cut shows large IP anisotropic strain upon applying a voltage (V) with piezoelectric coefficients d 31 and d 32 .…”

Magnetic Field-Induced Polarization Rotation in Strain-Engineered 0.94(Na0.5Bi0.5TiO3)-0.06BaTiO3/CoFe2O4 Magnetoelectric Nanocomposites for Energy Harvesting

“…22,23 The quality of the interface and effective strain transfer between the two phases plays a crucial role in deciding the magnitude of ME coupling in the ME composite thin film. 24,25 A recent study suggests estimation of the magnitude and spatial region of operation of interfacial strain by grazing incidence angle X-ray diffraction (XRD) in the 2−2 laminated NBT-BT/CFO trilayer. 26 The interfacial strain gradient existed around the spatial region 20− 30 nm away from the interface.…”

“…A lead-free ferroelectric 0.94­(Na 0.5 Bi 0.5 TiO 3 )-0.06BaTiO 3 (NBT-BT) was selected as a piezoelectric phase due to its excellent ferroelectric properties and high curie temperature ( T c ) when compared to other piezoelectric materials . Cobalt ferrite (CoFe 2 O 4 , CFO) possessing an inverse spinel structure was selected as a magnetostrictive phase because of high magnetostriction and thermal stability. , The quality of the interface and effective strain transfer between the two phases plays a crucial role in deciding the magnitude of ME coupling in the ME composite thin film. , A recent study suggests estimation of the magnitude and spatial region of operation of interfacial strain by grazing incidence angle X-ray diffraction (XRD) in the 2–2 laminated NBT-BT/CFO trilayer . The interfacial strain gradient existed around the spatial region 20–30 nm away from the interface.…”