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Nanomaterials (Basel). 2018 Dec 21;9(1). pii: E6. doi: 10.3390/nano9010006.

Magnetic Binary Supersaturated Solid Solutions Processed by Severe Plastic Deformation.

Author information

1
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria. martin.stueckler@oeaw.ac.at.
2
Institute of Physics, University of Graz, 8010 Graz, Austria. heinz.krenn@uni-graz.at.
3
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria. reinhard.pippan@oeaw.ac.at.
4
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria. lukas.weissitsch@oeaw.ac.at.
5
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria. stefan.wurster@oeaw.ac.at.
6
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria. andrea.bachmaier@oeaw.ac.at.

Abstract

Samples consisting of one ferromagnetic and one diamagnetic component which are immiscible at the thermodynamic equilibrium (Co-Cu, Fe-Cu, Fe-Ag) are processed by high-pressure torsion at various compositions. The received microstructures are investigated by electron microscopy and synchrotron X-ray diffraction, showing a microstructural saturation. Results gained from microstructural investigations are correlated to magnetometry data. The Co-Cu samples show mainly ferromagnetic behavior and a decrease in coercivity with increasing Co-content. The saturation microstructure of Fe-Cu samples is found to be dual phase. Results of magnetic measurements also revealed the occurrence of two different magnetic phases in this system. For Fe-Ag, the microstructural and magnetic results indicate that no intermixing between the elemental phases takes place.

KEYWORDS:

high-pressure torsion; magnetic properties; nanocrystalline; severe plastic deformation; supersaturation

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