Towards Flexible Magnetoelectronics: Buffer‐Enhanced and Mechanically Tunable GMR of Co/Cu Multilayers on Plastic Substrates

High-performance giant magnetoresistive sensorics on flexible Si membranes

“…This value is within the range of the figures previously reported for individual Ni-Fe thin films. 28,37 This strain induced effect is also reported for GMR multilayers prepared on flexible polymeric supports, 38 but are not observed when the GMR stacks are deposited onto pre-stretched elastomeric rubber membranes. 13,39 The latter is attributed to the formation of wrinkles, which accommodate tensile deformations of the substrate without straining the magnetic layers.…”

Giant Magnetoresistance of [Ni80Fe20/Au/Co/Au]NMultilayers Deposited on Flexible Substrates

“…It points to the inuence of the substrate on the perpendicular anisotropy of those sublayers. It should be emphasized that as the PMA of the Co sublayers originates from the surface anisotropy of the Co/Au interfaces [13,14] it is sensitive to any changes of its structure caused by an increased roughness of the plastic substrates [11]. In perpendicular conguration the MR(H) dependences (outside the hysteretic range) are almost indiscernible.…”

“…They can be due to imperfect alignment of the tape and/or due to some defects introduced during unmount-ing and mounting of the sample. The very small radius of the cylinder conrms the high bendability of the GMR system deposited on the polypropylene which is necessary for any practical exible electronics applications [11,16]. The mechanical stability of our MLs seems to be worse than that of Chen's samples [11] since after 100 manual bending/unbending cycles the GMR amplitude of [Ni 80 Fe 20 (2 nm)/Au(2 nm)/Co(0.8 nm)/Au(2 nm)] 10 ML measured in in-plane conguration decreased by 25%.…”

“…The very small radius of the cylinder conrms the high bendability of the GMR system deposited on the polypropylene which is necessary for any practical exible electronics applications [11,16]. The mechanical stability of our MLs seems to be worse than that of Chen's samples [11] since after 100 manual bending/unbending cycles the GMR amplitude of [Ni 80 Fe 20 (2 nm)/Au(2 nm)/Co(0.8 nm)/Au(2 nm)] 10 ML measured in in-plane conguration decreased by 25%. It should be noted, though, that to make the bending experiment we had to detach our sample (ML+adhesive tape) from the Si substrate introducing some undened stresses in the ML and the bending radius was only about 2.5 mm.…”

“…In successive works it was shown that an electrochemical synthesis, too, can be used for the deposition of the exible GMR sensors [10]. Recently it was demonstrated that exible magnetoelectronics can provide the mechanically tunable GMR sensors exhibiting very high magnetoresistance ratio and high mechanical stability [11].…”