Nanocomposite exchange-spring magnet synthesized by gas phase method: From isotropic to anisotropic

The fabrication of anisotropic nanocomposite exchange-spring magnets is demonstrated experimentally by using a gas-phase nanoparticle deposition technique. High resolution transmission electron microscopy images prove the experimental easy-axis definition of embedded hard magnetic nanoparticles in s...

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Bibliographic Details
Published in:Applied physics letters 2011-05, Vol.98 (22), p.222507-222507-3
Main Authors: Liu, Xiaoqi, He, Shihai, Qiu, Jiao-Ming, Wang, Jian-Ping
Format: Article
Language:English
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Summary:The fabrication of anisotropic nanocomposite exchange-spring magnets is demonstrated experimentally by using a gas-phase nanoparticle deposition technique. High resolution transmission electron microscopy images prove the experimental easy-axis definition of embedded hard magnetic nanoparticles in soft magnetic matrix. Exchange coupling between the hard and soft phases is confirmed by measuring recoil loops and δ M-H curve of the anisotropic FePt / Fe 0.8 Ni 0.2 nanocomposite. The magnetic energy product for the anisotropic exchange-spring magnet is 224% higher than the isotropic case.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3597225