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- W2953328884 abstract "Considering micro-electro-mechanical 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:Ni81Fe19) onto paper substrates utilized in various daily applications. Here, the Py:Ni81Fe19 coating was developed by means of, but not limited to, sputter deposition, and spans an area of 10x10 mm2 and a thickness of 70 nm. In this research, we investigated several paper materials covering a range of grammage of [80, 350] g/m2, surface roughness of [0.21, 3.462] {mu}m given by the root mean squared Rrms, various impregnations, porosity levels and surface macro-structures. Yet, in this paper, we focus on our findings with clean room paper (80 g/m2, Rrms = 2.877 {mu}m, 23% surface porosity, latex impregnation, no embossed macro-structure). Employing a four-point-probe resistivity measurement setup, we investigated the change of electrical resistance of Py:Ni81Fe19 under the presence of an oriented external magnetic field. Compared to the theoretical limit of 2.5% of Py:Ni81Fe19 on smooth surfaces, we have obtained large and positive magneto-resistive changes (2.5 - 14%) for these aforementioned systems. Principally, we analyzed the effect of surface topology of the clean room paper on the magneto-resistance sensitivity of Py:Ni81Fe19. We concluded that the occurrence of such magnetic behavior is most probably due to tunneling of electron waves through the asperities and porosity of the paper surface and subsequent scattering of electrons at pinned domain walls." @default.
- W2953328884 created "2019-06-27" @default.
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- W2953328884 date "2015-03-13" @default.
- W2953328884 modified "2023-09-25" @default.
- W2953328884 title "Paper-based spintronics: magneto-resistivity of permalloy onto paper substrates" @default.
- W2953328884 hasPublicationYear "2015" @default.
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