Superior Magnetic Performance in FePt L10 Nanomaterials

2019

Article

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The discovery of the high maximum energy product of 59 MGOe for NdFeB magnets is a breakthrough in the development of permanent magnets with a tremendous impact in many fields of technology. This value is still the world record, for 40 years. This work reports on a reliable and robust route to realize nearly perfectly ordered L1_0-phase FePt nanoparticles, leading to an unprecedented energy product of 80 MGOe at room temperature. Furthermore, with a 3 nm Au coverage, the magnetic polarization of these nanomagnets can be enhanced by 25% exceeding 1.8 T. This exceptional magnetization and anisotropy is confirmed by using multiple imaging and spectroscopic methods, which reveal highly consistent results. Due to the unprecedented huge energy product, this material can be envisaged as a new advanced basic magnetic component in modern micro and nanosized devices.

@article{2019Son,
  title = {Superior Magnetic Performance in FePt L10 Nanomaterials},
  author = {Son, K. and Ryu, G. H. and Jeong, H.-H. and Fink, L. and Merz, M. and Nagel, P. and Schuppler, S. and Richter, G. and Goering, E. and Sch{\"u}tz, G.},
  journal = {Small},
  volume = {15},
  number = {34},
  pages = {1902353},
  publisher = {Wiley},
  address = {Weinheim, Germany},
  month = jul,
  year = {2019},
  doi = {10.1002/smll.201902353},
  url = {https://onlinelibrary.wiley.com/doi/full/10.1002/smll.201902353},
  month_numeric = {7}
}