Structural and magnetic properties of iodide-mediated chemically synthesized L12 FePt3 nanoparticles
- Univ. of Delaware, Newark, DE (United States)
- National Centre of Scientific Research (NCSR) Demokritos, Athens (Greece)
In this work, we study the effect of elemental iodine as a halide intermediary in the synthesis of FePt3 nanoparticles using a co-reduction of Fe(acac)3 and (NH4)2PtCl2 with 1,2-hexadecanediol. Our study shows that elemental iodine facilitates the formation of FePt3 nanoparticles with the L12 structure. When iodine is not used, the as-made nanoparticles have mostly the disordered fcc FePt3 structure. The as-made nanoparticles are ferromagnetic and have a Curie temperature close to 380 K. Annealing of the as-made nanoparticles leads to an increased particle size and a transformation to the ordered L12 FePt3 phase. Nanoparticles annealed at 700°C for 30 minutes show a mixture of two magnetic phases, a ferromagnetic phase with a lower ordering temperature of ~300 K and an antiferromagnetic phase with a Néel temperature around 135 K.
- Research Organization:
- Univ. of Delaware, Newark, DE (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-90ER45413
- OSTI ID:
- 1849989
- Alternate ID(s):
- OSTI ID: 1755978
- Journal Information:
- AIP Advances, Vol. 11, Issue 1; Conference: 65. Annual Conference on Magnetism and Magnetic Materials, Palm Bay (held virtually), FL (United States), 2-6 Nov 2020; ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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