Magnetostrictive GMR sensor on flexible polyimide substrates

Uhrmann, Thomas; Bär, L.; Dimopoulos, Théodoros; Wiese, N.; Rührig, M.; Lechner, Anna M.

doi:10.1016/j.jmmm.2006.03.070

Cited by 59 publications

(31 citation statements)

References 5 publications

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“…Although the supports used in these studies are considered rigid, they allow for a small amount of bending deformation, which is translated to the functional magnetic layers on the outer surface as a tensile deformation (bending strain) of the order of about 0.1%. Later, similar studies were performed using plastic polyimide substrates 106 , which allowed for magnetoelectric measurements at tensile strains of up to 0.75% directly applied by stretching 107 . Higher levels of deformation were obtained by Y.F.…”

Section: State-of-the-artmentioning

confidence: 99%

Stretchable Magnetoelectronics

et al. 2011

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Abstract:In this work, stretchable magnetic sensorics is successfully established by combining metallic thin films revealing a giant magnetoresistance effect with elastomeric materials. Stretchability of the magnetic nanomembranes is achieved by specific morphologic features (e.g. wrinkles), which accommodate the applied tensile deformation while maintaining the electrical and magnetic integrity of the sensor device. The entire development, from the demonstration of the world-wide first elastically stretchable magnetic sensor to the realization of a technology platform for robust, ready-touse elastic magnetoelectronics with fully strain invariant properties, is described. The prepared soft giant magnetoresistive devices exhibit the same sensing performance as on conventional rigid supports, but can be stretched uniaxially or biaxially reaching strains of up to 270% and endure over 1,000 stretching cycles without fatigue. The comprehensive magnetoelectrical characterization upon tensile deformation is correlated with in-depth structural investigations of the sensor morphology transitions during stretching.With their unique mechanical properties, the elastic magnetoresistive sensor elements readily conform to ubiquitous objects of arbitrary shapes including the human skin. This feature leads electronic skin systems beyond imitating the characteristics of its natural archetype and extends their cognition to static and dynamic magnetic fields that by no means can be perceived by human beings naturally.Various application fields of stretchable magnetoelectronics are proposed and realized throughout this work. The developed sensor platform can equip soft electronic systems with navigation, orientation, motion tracking and touchless control capabilities. A variety of novel technologies, like smart textiles, soft robotics and actuators, active medical implants and soft consumer electronics will benefit from these new magnetic functionalities. Michael Melzer: Stretchable MagnetoelectronicsOutline 4

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Section: State-of-the-artmentioning

confidence: 99%

Stretchable Magnetoelectronics

et al. 2011

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“…104,105 Although the supports used in these studies are considered rigid, they allow for a small amount of bending deformation, which is translated to the functional magnetic layers on the outer surface as a tensile deformation (bending strain) of the order of about 0.1%. Later, similar studies were performed using plastic polyimide substrates, 106 which allowed for magnetoelectric measurements at tensile strains of up to 0.75% directly applied by stretching. 107 Higher levels of deformation were obtained by Chen et al, who deposited extended GMR films on buffer coated polyester transparency, as shown in Figure 5(a).…”

Section: S Hmentioning

confidence: 99%

Shapeable magnetoelectronics

Makarov

Melzer

Karnaushenko

et al. 2016

Applied Physics Reviews

155

111

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“…This effect has been used to test a stress sensor using magnetostrictive thin films [5]. On the other hand, such films deposited onto compliant substrates can be tensily stressed and in situ characterized by high-frequency (HF) permeability [6], MOKE [7] and giant magnetoresistance (GMR) measurements [8]. The main purpose of these studies was also to demonstrate the feasibility of a magnetostrictive sensor on a flexible polyimide substrate.…”

Section: Introductionmentioning

confidence: 99%

In situ study of spin waves in thin films deposited onto compliant substrates submitted to external stresses

Karboul-Trojet¹,

Faurie²,

Roussigné³

et al. 2011

J. Phys. D: Appl. Phys.

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We have developed a new methodology to study the effect of mechanical stress on spin waves in thin films deposited onto compliant substrates. It is based on micro-tensile tests combined with Brillouin light scattering spectroscopy, which allows in situ probing of the magnetization dynamics of the studied film upon deformation. This paper shows from both theoretical and experimental approaches that the magneto-elastic coupling in the saturation regime leads to a simple linear relationship between the spin waves frequency and the stress applied to the magnetic film. The linear part of the experimental data can be reproduced theoretically, assuming a complete strain transfer through the metallic film-compliant substrate interface.

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Magnetostrictive GMR sensor on flexible polyimide substrates

Cited by 59 publications

References 5 publications

Stretchable Magnetoelectronics

Stretchable Magnetoelectronics

Shapeable magnetoelectronics

In situ study of spin waves in thin films deposited onto compliant substrates submitted to external stresses

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