Magnetic nanowires as permanent magnet materials
T. Maurer, F. Ott, G. Chaboussant, Y. Soumare, J.-Y. Piquemal, G. Viau
TL;DR
This paper reports on the fabrication and magnetic properties of metallic nanowires, demonstrating their potential as high-temperature permanent magnets and high-density recording media.
Contribution
It introduces a low-temperature chemical process to produce magnetic nanowires with high coercivity suitable for permanent magnet applications.
Findings
High coercivity of 6.5 kOe at 140 K and 4.8 kOe at 300 K.
Potential to replace traditional permanent magnets like AlNiCo or SmCo.
Suitability for high-density magnetic recording.
Abstract
We present the fabrication of metallic magnetic nanowires using a low temperature chemical process. We show that pressed powders and magnetically oriented samples exhibit a very high coercivity (6.5 kOe at 140 K and 4.8 kOe at 300 K). We discuss the magnetic properties of these metamaterials and show that they have the suitable properties to realize "high temperature magnets" competitive with AlNiCo or SmCo permanent magnets. They could also be used as recording media for high density magnetic recording.
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