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Superior Magnetic Performance in FePt L1 0 Nanomaterials
Author(s) -
Son Kwanghyo,
Ryu Gihun,
Jeong HyeonHo,
Fink Lukas,
Merz Michael,
Nagel Peter,
Schuppler Stefan,
Richter Gunther,
Goering Eberhard,
Schütz Gisela
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201902353
Subject(s) - nanomaterials , materials science , nanotechnology , magnetic nanoparticles , nanoparticle
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.