Magnetization reversal in chemically synthesized chains of permalloy nanospheres

Controlled magnetic interactions in magnetic nanoparticles are a fundamental concern to the future development of nanometer-sized “magnonic” device applications. Here, we report the magnetization reversal mechanism in one-dimensional chain-like structures made of permalloy (Ni 80 Fe 20 ) magnetic na...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2022-05, Vol.128 (5), Article 394
Main Authors: Laha, Pinaki, Mahato, Bipul Kumar, Gayen, Rabindranath, Datta, Subhadeep, Rawat, Rajdeep Singh
Format: Article
Language:English
Subjects:
Anisotropy
Applied physics
Chains
Characterization and Evaluation of Materials
Chemical synthesis
Condensed Matter Physics
Diameters
Ferrous alloys
Hysteresis loops
Machines
Magnetic alloys
Magnetic fields
Magnetic measurement
Magnetism
Magnetization reversal
Manufacturing
Materials science
Nanoparticles
Nanospheres
Nanotechnology
Optical and Electronic Materials
Physics
Physics and Astronomy
Processes
Surfaces and Interfaces
Thin Films
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Summary:Controlled magnetic interactions in magnetic nanoparticles are a fundamental concern to the future development of nanometer-sized “magnonic” device applications. Here, we report the magnetization reversal mechanism in one-dimensional chain-like structures made of permalloy (Ni 80 Fe 20 ) magnetic nanoparticles of about 200 nm diameters. Well-aligned and uniform permalloy nanochains have been synthesized using a chemical synthesis method under applied magnetic fields. The morphological, microstructural and compositional studies confirm the linear distribution of stoichiometric permalloy nanoparticles with spherical shape along the applied magnetic field to form chain-like structure. Magnetic measurements also demonstrate that the magnetization reversal is mainly attributed to the spherical vortices and shape anisotropy of the chains and typical hard and easy-axis magnetic hysteresis loops. Micromagnetic simulations (OOMMF) are performed to comprehend the experimental results and to make a correlation with the magnetization reversal mechanism in permalloy nanoparticle chains.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-022-05519-8