Abstract
We have performed magneto-optical measurements of sputter deposited permalloy (NiFe 81/19) thin films on a polyimide based spin-on substrate and a silicon oxide substrate. Experiments were performed by means of the magneto-optic Kerr effect in order to complement the findings concerning soft magnetic behaviour on the macroscopic scale presented previously (Rittinger et al., Impact of different polyimide-based substrates on the soft magnetic properties of NiFe thin films, SPIE Microtechnologies. International Society for Optics and Photonics, Bellingham, pp 95171R, 2015) with new insights into the magnetic domain structures of such samples. First, magnetization curves (R–H-, B–H-curves) are compared with corresponding magneto-optical hystereses. Second, by taking into consideration the results of the magnetic microstructure analysis, further aspects of the interactions between the substrate and the functional thin film are revealed in form of analogies between observations on the microscopic scale and variations of macroscopic magnetization curves of analysed samples. Furthermore, the shape and detailed spatial arrangement of domains and their boundaries are determined for the investigated samples, supplying further information on the properties and state of stress of the thin films. Doing so, we aim to provide precise and reliable anisotropic magnetoresistive (AMR) sensors on flexible polymer substrates in the future.
Similar content being viewed by others
References
Bedoya-Pinto A, Donolato M, Gobbi M, Hueso LE, Vavassori P (2014) Flexible spintronic devices on Kapton. Appl Phys Lett 104(6):062412
Chikazumi S, Graham CD (2009) Physics of ferromagnetism, vol 94, 2nd edn. Oxford University Press, Oxford
Choe G, Steinback M (1999) Surface roughness effects on magnetoresistive and magnetic properties of NiFe thin films. J Appl Phys 85:5777
Fernández E, Kurlyandskaya GV, García-Arribas A, Svalov AV (2012) Nanostructured giant magneto-impedance multilayers deposited onto flexible substrates for low pressure sensing. Nanoscale Res Lett 7(1):1–5
Griesbach T, Wurz MC, Rissing L (2012) Development and fabrication of modular micro sensors on flexible polymer foils. In: 1st joint international symposium on system-integrated intelligence
Grimes CA (1995) Sputter deposition of magnetic thin films onto plastic: the effect of undercoat and spacerlayer composition on the magnetic properties of multilayer permalloy thin films. In: IEEE transactions on magnetics 31, No. 6
Guittoum A, Bourzami A, Layadi A, Schmerber G (2012) Structural, electrical and magnetic properties of evaporated permalloy thin films: effect of substrate and thickness. Eur Phys J Appl Phys 58:20301
Hubert A, Schäfer R (2009) Magnetic domains. Springer, Berlin
Jogschies L, Heitmann J, Klaas D, Rissing L (2014) Investigations on strain behaviour of polymer substrates during a separation process. In: 2nd international conference on system-integrated intelligence
Lachmayer R, Mozgova I, Sauthoff B, Gottwald P (2013) Product evolution and optimization based on gentelligent components and product life cycle data. Smart product engineering lecture notes in production engineering, pp 685–694
Lan NT, Mercone S, Moulin J, El Bahoui A, Faurie D, Zighem F, Haddadi H (2015) Magnetic domain-wall motion study under an electric field in a Finemet® thin film on flexible substrate. J Magn Magn Mater 373:259–262
Lee EA (2008) Cyber physical systems: design challenges. In: 11th IEEE international symposium on object oriented real-time distributed computing (ISORC), pp 363–369
Néel L (1953) L’anisotropie superficielle des substances ferromagnétiques. C R Acad Sci Paris 237:1468–1470
Oh S, Jadhav M, Lim J, Reddy V, Kim C (2013) An organic substrate based magnetoresistive sensor for rapid bacteria detection. Biosens Bioelectron 41:758–763
Rittinger J, Taptimthong P, Jogschies L, Wurz MC, Rissing L (2015) Impact of different polyimide-based substrates on the soft magnetic properties of NiFe thin films, SPIE Microtechnologies. International Society for Optics and Photonics, Bellingham, pp 95171R
Trunk T, Redjdal M, Kákay A, Ruane MF, Humphrey FB (2001) Domain wall structure in permalloy films with decreasing thickness at the Bloch to Néel transition. J Appl Phys 89:7606
Tumanski S (2001) Thin film magnetoresistive sensors, IOP Publishing, Bristol
Uhrmann T, Bär L, Dimopoulos T, Wiese N, Rührig M, Lechner A (2006) Magnetostrictive GMR sensor on flexible polyimide substrates. J Magn Magn Mater 307(2):209–211
Acknowledgments
This research has been sponsored in part by the German Research Foundation (DFG) within the Collaborative Research Center (SFB) 653 “Gentelligent Components in their Lifecycle”.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Rittinger, J., Taptimthong, P., Jogschies, L. et al. Magnetic microstructure analysis of sputter deposited permalloy thin films on a spin-on polyimide substrate. Microsyst Technol 22, 1627–1632 (2016). https://doi.org/10.1007/s00542-015-2792-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00542-015-2792-0