Structural and magnetic properties of iodide-mediated chemically synthesized L12 FePt3 nanoparticles

Deepchand, Vimal; Tzitzios, Vasileios; Hadjipanayis, George C.

doi:10.1063/9.0000102

Structural and magnetic properties of iodide-mediated chemically synthesized L1₂ FePt₃ nanoparticles

Journal Article · Tue Jan 05 23:00:00 EST 2021 · AIP Advances

DOI:https://doi.org/10.1063/9.0000102· OSTI ID:1849989

Deepchand, Vimal ^[1]; ^[2]; Hadjipanayis, George C. ^[3]

Univ. of Delaware, Newark, DE (United States); Univ. of Delaware, Newark, DE (United States)
National Centre of Scientific Research (NCSR) Demokritos, Athens (Greece)
Univ. of Delaware, Newark, DE (United States)

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.

View Accepted Manuscript (DOE)

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, Journal Name: AIP Advances Journal Issue: 1 Vol. 11; ISSN 2158-3226

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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