Large Coercivity in Nanostructured Rare-earth-free MnxGa Films

Details Large Coercivity in Nanostructured Rare-earth-free MnxGa Films Large Coercivity in Nanostructured Rare-earth-free MnxGa Films

2011-11-27

arxiv.org/abs/1111.6267v1

Physics

Condensed Matter

Materials Science

Scientific paper

The magnetic hysteresis of MnxGa films exhibit remarkably large coercive fields as high as 2.5 T when fabricated with nanoscale particles of a suitable size and orientation. This coercivity is an order of magnitude larger than in well-ordered epitaxial film counterparts and bulk materials. The enhanced coercivity is attributed to the combination of large magnetocrystalline anisotropy and ~ 50 nm size nanoparticles. The large coercivity is also replicated in the electrical properties through the anomalous Hall effect. The magnitude of the coercivity approaches that found in rare-earth magnets, making them attractive for rare-earth-free magnet applications.

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