Microstructural Changes Influencing the Magnetoresistive Behavior of Bulk Nanocrystalline Materials
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Microstructure and mechanical properties · Magnetic properties of thin films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Erich Schmid Institute of Materials Science of the Austrian Academy of Sciences, 8700 Leoben, Austria
Deutsches Elektronen-Synchrotron (DESY), Photon Science, 22607 Hamburg, Germany
Funding
H2020 European Research Council
References (38)
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