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

Journal Article · · AIP Advances
DOI:https://doi.org/10.1063/9.0000102· OSTI ID:1849989
 [1]; ORCiD logo [2];  [1]
  1. Univ. of Delaware, Newark, DE (United States)
  2. National Centre of Scientific Research (NCSR) Demokritos, Athens (Greece)
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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

References (15)

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Enhancing the Ordering and Coercivity of L1 0 FePt Nanostructures with Bismuth Additives for Applications Ranging from Permanent Magnets to Catalysts journal April 2019
Halide Ion-Mediated Synthesis of L1 0 -FePt Nanoparticles with Tunable Magnetic Properties journal November 2018
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Structurally Ordered FePt Nanoparticles and Their Enhanced Catalysis for Oxygen Reduction Reaction journal April 2010
New Approach to Fully Ordered fct-FePt Nanoparticles for Much Enhanced Electrocatalysis in Acid journal March 2015
Antiferromagnetic Single Domain L1 2 FePt 3 Nanocrystals journal January 2010
Size dependence of ordering in FePt nanoparticles journal March 2004
Chemically ordered FePt3 nanoparticles synthesized by a bimetallic precursor and their magnetic transitions journal January 2009
Recent Advances in FePt Nanoparticles for Biomedicine journal January 2015
Structural and magnetic properties of the ordered FePt3, FePt and Fe3Pt nanoparticles journal January 2014
Recent Advances in Chemical Synthesis, Self-Assembly, and Applications of FePt Nanoparticles journal February 2006
A general strategy for synthesizing high-coercivity L1 0 -FePt nanoparticles journal January 2017
Antiferromagnetic structure of FePt 3 films studied by neutron scattering journal March 2001
Magnetism and structure of chemically disordered Fe Pt 3 nanocubes journal April 2007

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