Abstract
The magnetic hysteresis of MnₓGa films exhibit remarkably large coercive fields as high as μₒHC=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 ~50-100 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.
Keywords
magnetic hysteresis, MnₓGa films, coercive fields
Subject Categories
Hysteresis, Nanoparticles
Disciplines
Electromagnetics and photonics | Nanoscience and Nanotechnology
Publisher
American Institute of Physics
Publication Date
12-22-2011
Rights Information
VC 2011 American Institute of Physics
Rights Holder
American Institute of Physics
Permanent URL
Recommended Citation
Heiman, Don; Nummy, Tom; Bennett, Steve; and Cardinal, Tom, "Large coercivity in nanostructured rare-earth-free MnₓGa films" (2011). Physics Faculty Publications. Paper 525. http://hdl.handle.net/2047/d20002403
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Notes
Originally published in Applied Physics Letters 99, 252506 (2011). doi:10.1063/1.3671329