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Article

Microstructural Changes Influencing the Magnetoresistive Behavior of Bulk Nanocrystalline Materials

1
Erich Schmid Institute of Materials Science of the Austrian Academy of Sciences, 8700 Leoben, Austria
2
Deutsches Elektronen-Synchrotron (DESY), Photon Science, 22607 Hamburg, Germany
*
Author to whom correspondence should be addressed.
Current Address: Anton Paar GmbH, 8054 Graz, Austria.
Appl. Sci. 2020, 10(15), 5094; https://doi.org/10.3390/app10155094
Received: 17 June 2020 / Revised: 15 July 2020 / Accepted: 21 July 2020 / Published: 24 July 2020
Bulk nanocrystalline materials of small and medium ferromagnetic content were produced using severe plastic deformation by high-pressure torsion at room temperature. Giant magnetoresistive behavior was found for as-deformed materials, which was further improved by adjusting the microstructure with thermal treatments. The adequate range of annealing temperatures was assessed with in-situ synchrotron diffraction measurements. Thermally treated Cu–Co materials show larger giant magnetoresistance after annealing for 1 h at 300 °C, while for Cu-Fe this annealing temperature is too high and decreases the magnetoresistive properties. The improvement of magnetoresistivity by thermal treatments is discussed with respect to the microstructural evolution as observed by electron microscopy and ex-situ synchrotron diffraction measurements. View Full-Text
Keywords: severe plastic deformation; high-pressure torsion; nanocrystalline materials; soft magnets; magnetic properties; magnetoresistance; microstructural characterization severe plastic deformation; high-pressure torsion; nanocrystalline materials; soft magnets; magnetic properties; magnetoresistance; microstructural characterization
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MDPI and ACS Style

Wurster, S.; Stückler, M.; Weissitsch, L.; Müller, T.; Bachmaier, A. Microstructural Changes Influencing the Magnetoresistive Behavior of Bulk Nanocrystalline Materials. Appl. Sci. 2020, 10, 5094. https://doi.org/10.3390/app10155094

AMA Style

Wurster S, Stückler M, Weissitsch L, Müller T, Bachmaier A. Microstructural Changes Influencing the Magnetoresistive Behavior of Bulk Nanocrystalline Materials. Applied Sciences. 2020; 10(15):5094. https://doi.org/10.3390/app10155094

Chicago/Turabian Style

Wurster, Stefan, Martin Stückler, Lukas Weissitsch, Timo Müller, and Andrea Bachmaier. 2020. "Microstructural Changes Influencing the Magnetoresistive Behavior of Bulk Nanocrystalline Materials" Applied Sciences 10, no. 15: 5094. https://doi.org/10.3390/app10155094

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