Magnetic nanowires as permanent magnet materials

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. (C) 2007 American Institute of Physics.