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Cobalt‐Substituted Magnetite Nanoparticles and Their Assembly into Ferrimagnetic Nanoparticle Arrays
Author(s) -
Yu Yongsheng,
MendozaGarcia Adriana,
Ning Bo,
Sun Shouheng
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201300595
Subject(s) - ferrimagnetism , materials science , nanoparticle , dispersity , magnetite , cobalt , nanotechnology , magnetite nanoparticles , magnetic nanoparticles , dispersion (optics) , chemical engineering , magnetic field , magnetization , metallurgy , polymer chemistry , optics , physics , engineering , quantum mechanics
A simple process to prepare monodisperse ferrimagnetic cobalt‐substituted magnetite Co x Fe 3‐ x O 4 nanoparticles is reported . These ferrimagnetic nanoparticles are readily dispersed in hexane, forming a stable ferrimagnetic nanoparticle dispersion, and allowing easy nanoparticle self‐assembly. When assembled under an external magnetic field (5.5 kOe), these nanoparticles show preferred magnetic alignment with their H c reaching 2.49 kOe.