TY - CHAP A1 - Pelkner, Matthias A1 - Kreutzbruck, Marc A2 - Fermon, C. A2 - Van de Voorde, M. H. T1 - Spin Electronics for Non Destructive Testing T2 - Nanomagnetism - Applications and Perspectives N2 - Electromagnetic methods are widely used in Non-destructive Testing industries (NDT). In order to meet the requirements, safety-relevant products and structures have to be tested reliably during production or within subsequent maintenance cycles. For this purpose industrial users call for adapted testing methods which allow the detection of relevant defects such as cracks and pore in ferromagnetic or conductive materials. Automated testing systems and the application of sensor arrays are of great interest in order to enhance inspection quality and to decrease testing time and costs. Magneto resistance (MR) sensors like giant magneto resistance (GMR) or tunnel magneto resistance sensor (TMR) have proofed their suitability in many NDT-applications due to their extraordinary properties which combine high field sensitivity, a high spatial resolution and low costs. Due to their small size these sensors can be useful – in addition to the pure detection task – for a more detailed defect characterization and defect reconstruction providing defect size, orientation and geometry. This chapter gives a brief introduction of electromagnetic testing methods, i.e., magnetic particle inspection (MPI) and eddy current testing (ET), followed by two different approaches for which MR sensor arrays were successfully adapted. PB - Wiley-VCH Verlag GmbH & Co. KGaA CY - Weinheim KW - Magneto resistance KW - GMR KW - TMR KW - Non-destructive testing KW - Magnetic flux leakage KW - Eddy current PY - 2017 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/41463 AN - OPUS4-41463 SN - 978-3-527-33985-3 SP - 81 EP - 102 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany