Flexible spintronic devices on Kapton

Bedoya-Pinto, Amílcar; Donolato, Marco; Gobbi, Marco; Hueso, Luis E.; Vavassori, P.

doi:10.1063/1.4865201

Cited by 93 publications

(90 citation statements)

References 26 publications

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“…This possibility may open up a direction to tailor the interfacial magnetic anisotropy in thin ferromagnetic films without any additional layers of heavy metal, which, in turn, may lead to simpler and cheaper ways to engineer systems with any given anisotropy. Nowadays, the curvature effects in thin magnetic films are becoming more accessible due to experimental advances in flexible electronics [23][24][25][26][27], making the proposed method to control the anisotropy experimentally viable in the near future. Moreover, our findings suggest that similar effects might be observed in thin films with significant surface roughness.…”

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confidence: 99%

Engineering Curvature-Induced Anisotropy in Thin Ferromagnetic Films

et al. 2017

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We investigate the effect of large curvature and dipolar energy in thin ferromagnetic films with periodically modulated top and bottom surfaces on magnetization behavior. We predict that the dipolar interaction and surface curvature can produce perpendicular anisotropy which can be controlled by engineering special types of periodic surface structures. Similar effects can be achieved by a significant surface roughness in the film. We demonstrate that, in general, the anisotropy can point in an arbitrary direction depending on the surface curvature. Furthermore, we provide simple examples of these periodic surface structures to show how to engineer particular anisotropies in thin films.

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confidence: 99%

Engineering Curvature-Induced Anisotropy in Thin Ferromagnetic Films

et al. 2017

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“…This process limits the desired phenomenon, especially when the substrate is stiff such as for commonly used wafer (Si, GaAs, ...). This often reported limitation [14] (a few ten percents of losses in best cases) can be avoided by depositing the magnetic thin film on a compliant substrate such as polyimides [10] that are more and more used in flexible spintronics [16].…”

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confidence: 99%

Optimization of indirect magnetoelectric effect in thin-film/substrate/piezoelectric-actuator heterostructure using polymer substrate

Gueye¹,

Zighem²,

Faurie³

et al. 2014

Applied Physics Letters

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Indirect magnetoelectric effect has been studied in magnetostrictive-film/substrate/piezoelectricactuator heterostructures. Two different substrates have been employed: a flexible substrate (Young's modulus of 4 GPa) and a rigid one (Young's modulus of 180 GPa). A clear optimization of the indirect magnetoelectric coupling, studied by micro-strip ferromagnetic resonance, has been highlighted when using the polymer substrate. However, in contrast to the rigid substrate, the flexible substrate also leads to an a priori undesirable and huge uniaxial anisotropy which seems to be related to a non equibiaxial residual stress inside the magnetostrictive film. The "strong" amplitude of this non equibiaxiallity is due to the large Young's modulus mismatch between the polymer and the magnetostrictive film which leads to a slight curvature along a given direction during the elaboration process and thus to a large magnetoelastic anisotropy.

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“…In this respect, the smart combination of metallic thin films deposited directly on polymeric supports allowed to fabricate flexible Hall sensors 11 as well as flexible and even stretchable magnetoelectronics relying on the giant magnetoresistance (GMR) effect in multilayers [12][13][14] and spin valves 15,16 or on the tunnel magnetoresistance in magnetic tunnel junctions. 17,18 These flexible devices are already successfully integrated in fluidic systems, 19 applied as pointing devices and proximity sensorics 11,20 and act as components of printed electronics. 21,22 Integrated into smart skins, these magneto-sensory systems equip the recipient with a so called sixth sense able to perceive the presence of static or dynamic magnetic fields for orientation and manipulation aids.…”

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confidence: 99%

High-performance giant magnetoresistive sensorics on flexible Si membranes

Pérez

Melzer

Makarov

et al. 2015

Applied Physics Letters

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We fabricate high-performance giant magnetoresistive (GMR) sensorics on Si wafers, which are subsequently thinned down to 100 mu m or 50 mu m to realize mechanically flexible sensing elements. The performance of the GMR sensors upon bending is determined by the thickness of the Si membrane. Thus, bending radii down to 15.5mm and 6.8mm are achieved for the devices on 100 mu m and 50 mu m Si supports, respectively. The GMR magnitude remains unchanged at the level of (15.3 +/- 0.4)% independent of the support thickness and bending radius. However, a progressive broadening of the GMR curve is observed associated with the magnetostriction of the containing Ni81Fe19 alloy, which is induced by the tensile bending strain generated on the surface of the Si membrane. An effective magnetostriction value of lambda(s) = 1.7 x 10(-6) is estimated for the GMR stack. Cyclic bending experiments showed excellent reproducibility of the GMR curves during 100 bending cycles

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Flexible spintronic devices on Kapton

Cited by 93 publications

References 26 publications

Engineering Curvature-Induced Anisotropy in Thin Ferromagnetic Films

Engineering Curvature-Induced Anisotropy in Thin Ferromagnetic Films

Optimization of indirect magnetoelectric effect in thin-film/substrate/piezoelectric-actuator heterostructure using polymer substrate

High-performance giant magnetoresistive sensorics on flexible Si membranes

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