dc.contributor.authorLiu, Fei
dc.contributor.authorDong, Yunhe
dc.contributor.authorYang, Wenlong
dc.contributor.authorYu, Jing
dc.contributor.authorXu, Zhichuan
dc.contributor.authorHou, Yanglong
dc.identifier.citationLiu, F., Dong, Y., Yang, W., Yu, J., Xu, Z., & Hou, Y. (2014). Exchange-coupled fct-FePd/α-Fe nanocomposite magnets converted from Pd/Fe3O4 core/shell nanoparticles. Chemistry -A European journal, 20(46), 15197-15202.en_US
dc.description.abstractWe report the controlled synthesis of exchange-coupled face-centered tetragonal (fct) FePd/α-Fe nanocomposite magnets with variable Fe concentration. The composite was converted from Pd/Fe3O4 core/shell nanoparticles through a high-temperature annealing process in a reducing atmosphere. The shell thickness of core/shell Pd/Fe3O4 nanoparticles could be readily tuned, and subsequently the concentration of Fe in nanocomposite magnets was controlled. Upon annealing reduction, the hard magnetic fct-FePd phase was formed by the interdiffusion between reduced α-Fe and face-centered cubic (fcc) Pd, whereas the excessive α-Fe remained around the fct-FePd grains, realizing exchange coupling between the soft magnetic α-Fe and hard magnetic fct-FePd phases. Magnetic measurements showed variation in the magnetic properties of the nanocomposite magnets with different compositions, indicating distinct exchange coupling at the interfaces. The coercivity of the exchange-coupled nanocomposites could be tuned from 0.7 to 2.8 kOe and the saturation magnetization could be controlled from 93 to 160 emu g−1. This work provides a bottom-up approach using exchange-coupled nanocomposites for engineering advanced permanent magnets with controllable magnetic properties.en_US
dc.relation.ispartofseriesChemistry - A European journalen_US
dc.rights© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.en_US
dc.titleExchange-coupled fct-FePd/α-Fe nanocomposite magnets converted from Pd/Fe3O4 core/shell nanoparticlesen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Materials Science and Engineeringen_US

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