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Decrease in the Particle Size and Coercivity of Self‐Assembled CoNi Nanoparticles Synthesized Under a Repulsive Magnetic Field
Author(s) -
ur Rehman Sajid,
Ahmed Rida,
Liu Jian,
Wang Jingmin,
Sun Mingze,
Fang Zhenbin,
Aslam Muhammad Adnan,
Morais Paulo Cesar,
Wang Chunchang,
Bi Hong
Publication year - 2019
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201900047
Subject(s) - materials science , nanomagnet , coercivity , nanoparticle , nanomaterials , magnetic nanoparticles , nanotechnology , magnetic field , spintronics , particle size , nanostructure , cobalt , condensed matter physics , chemical engineering , ferromagnetism , magnetization , metallurgy , physics , quantum mechanics , engineering
Abstract Towards the challenge for synthesis of smaller‐sized heterostructures and hybrid composites for nanomagnets and magnetic fluid applications. Here, a novel method is reported to reduce the particle size of Cobalt–Nickel (CoNi) magnetic nanoparticles by placing them between a static, repulsive magnetic field (N–N/S–S) during synthesis in contrast to the conventional method of applying an attractive (N–S) magnetic field. The obtained smaller sized‐CoNi nanoparticles (≈40 nm) possess a uniform size, an excellent monodispersity, and outstanding magnetic properties. The results clearly demonstrate that the size and morphology change of CoNi nanoparticles have great influence on their magnetic properties. This study provides a footprint to design new heterostructured magnetic nanomaterials under the same‐poled magnetic field for potential applications in magnetic fluids, spintronics, and other related industries.