Journal
NANOSCALE
Volume 6, Issue 18, Pages 10638-10642Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr02163k
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Funding
- National Basic Research Program of China [2010CB934601]
- NSFC [51125001, 51172005, 90922033, 20806093]
- Natural Science Foundation of Beijing [2122022]
- Doctoral Program [20120001110078]
- Natural Science Foundation of Shandong Province [ZR2011EMQ001]
- Technology Project of Qingdao [14-2-4-108-jch]
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It is extremely desirable but challenging to develop exchange-coupled magnets with well-dispersed hard/soft phase and confined size to meet the high energy requirements of advanced magnets in modern industry and information technology. Here, we report a novel bottom-up strategy with two-step thermal decomposition and reductive annealing process to synthesize Nd2Fe14B/alpha-Fe nanocomposites, in which effective control of the hard/soft magnetic phase size and proportion was achieved. It is worth noting that the composition, as well as phase distribution, can be readily tuned by changing the ratio between Nd-Fe-B-oxide and alpha-Fe. This work provides an effective approach to adjust the phase size and distribution for exchange-coupled, rare-earth nanomagnets, which can be fundamental for high energy magnets.
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