Structure and Magnetic Properties of Etched NiFeCo Films

Malyutin, V. I.; Osukhovskii, V. E.; Vorobiev, Yu. D.; Shishkov, A. G.; Yudin, Y. V.

doi:10.1515/9783112501146-005

Cited by 1 publication

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“…In the low surface roughness regime (< 10 nm), it was identified that layers deposited on rough surfaces are less sensitive to magnetic fields, which is given by a lower change in magnetoresistance [ 22]. For intermediate surface roughness regimes (< 100 nm), it was observed that the magnetization reversal depends heavily on the surface roughness, such that the magnetic domain walls once pinned onto rough surfaces can hardly nucleate and propagate, especially with the increase in the ratio of mean roughness to film thickness ( [ 18], [ 19]). Hence, the ferromagnetic layer becomes more resistant to the magnetic field having a large magnetic coercivity, which is disadvantageous for sensing applications.…”

Section: Prior Art On Magnetics In Paper-based Systemsmentioning

confidence: 99%

Paper-based spintronics: Magneto-resistivity of permalloy onto paper substrates

Akin¹,

Rissing²

2015

2015 IEEE 65th Electronic Components and Technology Conference (ECTC)

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Driven by low-cost, resource abundance and distinct material properties, the use of paper in electronics, optics and fluidics is under investigation. In order to realize a dense coverage of sensor networks as part of the roadmap of the internet-of-things, achieving lower manufacturing cost of the aforementioned sensors is required. Considering sensor systems based on magneto-resistance principles (anisotropic, giant, tunnel) that are conventionally manufactured onto inorganic semiconductor materials, we propose the use of paper substrates for cost reduction purposes primarily. In particular, we studied the magneto-resistance sensitivity of permalloy (Py:Ni 81 Fe 19 ) onto paper substrates. In this work, we report on our findings with clean room paper (80 g/m², R rms = 2.877 µm, 23% surface porosity, latex impregnation, no embossed macro-structure). Here, the Py:Ni 81 Fe 19 coating was manufactured by means of a dry process, sputter deposition, and spans an area of 10x10 mm² and a thickness of 70 nm. Employing a four-point-probe DC resistivity measurement setup, we investigated the change of electrical resistance of Py:Ni 81 Fe 19 under the presence of an oriented external magnetic field. In particular, we investigate the magneto-resistive change at two configurations: (1) the direction of the magnetic field is parallel to the nominal induced electric current and (2) the direction of the magnetic field is perpendicular to the electric current. Due to the stochastic orientation of the fibers interplaying with the Py:Ni 81 Fe 19 coating, the change in magneto-resistance of the overall system at both measurement configurations closely corresponds to the classical response of Py:Ni 81 Fe 19 at a ±45° angle between the direction of electrical current and magnetic field. Using the magneto-optic kerr effect, we observed the formation of domain walls at the fiber bending locations. Future work will focus on the impact of layer thickness, fiber dimensions and structure of magnetic coating on the performance of the paper-based Py:Ni 81 Fe 19 magnetoresistors.

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Section: Prior Art On Magnetics In Paper-based Systemsmentioning

confidence: 99%