Magnetic microstructure analysis of sputter deposited permalloy thin films on a spin-on polyimide substrate

Rittinger, J.; Taptimthong, Piriya; Jogschies, Lisa; Wurz, Marc Christopher; Rissing, Lutz

doi:10.1007/s00542-015-2792-0

Cited by 6 publications

(1 citation statement)

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“…Our results offer a platform for customization of the properties of magnetic thin films together with the additional features afforded by their mechanical flexibility and we hope this will stimulate further theoretical and experimental investigations into fabrication and studies of functional flexible thin films. While it is impossible to cover all the relevant literature, it is important to mention that other studies of NiFe thin films deposited onto flexible substrates have been recently reported, but unlike our studies, their emphasis was on the improvement of anisotropic magneto-resistance of flexible NiFe thin films [16,17]. It is also interesting to mention that our PVDF / NiFe samples are in fact free-standing, unclamped, bi-layer composite multiferroics consisting of piezoferroelectric active substrate / layer and ferromagnetic NiFe layer.…”

Section: Discussionmentioning

confidence: 99%

Development of flexible Ni 80 Fe 20 magnetic nano-thin films

Vopson

Naylor

Saengow

et al. 2017

Physica B: Condensed Matter

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Flexible magnetic Ni 80 Fe 20 thin films with excellent adhesion, mechanical and magnetic properties have been fabricated using magnetron plasma deposition. We demonstrate that flexible Ni 80 Fe 20 thin films maintain their non-flexible magnetic properties when the films are over 60 nm thick. However, when their thickness is reduced, the flexible thin films display significant increase in their magnetic coercive field compared to identical films coated on a solid Silicon substrate. For a 15 nm flexible Ni 80 Fe 20 film coated onto 110µm Polyvinylidene fluoride polymer substrate, we achieved a remarkable 355% increase in the magnetic coercive field relative to the same film deposited onto a Si substrate. Experimental evidence, backed by micro-magnetic modelling, indicates that the increase in the coercive fields is related to the larger roughness texture of the flexible substrates. This effect essentially transforms soft Ni 80 Fe 20 permalloy thin films into medium / hard magnetic films allowing not only mechanical flexibility of the structure, but also fine tuning of their magnetic properties.

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Section: Discussionmentioning

confidence: 99%