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High-Moment FeCo Magnetic Nanoparticles Obtained by Topochemical H2 Reduction of Co-Ferrites

التفاصيل البيبلوغرافية
العنوان: High-Moment FeCo Magnetic Nanoparticles Obtained by Topochemical H2 Reduction of Co-Ferrites
المؤلفون: Alexander Omelyanchik, Gaspare Varvaro, Pierfrancesco Maltoni, Valeria Rodionova, Jean-Pierre Miranda Murillo, Federico Locardi, Maurizio Ferretti, Claudio Sangregorio, Fabio Canepa, Petr Chernavsky, Nikolai Perov, Davide Peddis
المصدر: Applied Sciences, Vol 12, Iss 4, p 1899 (2022)
بيانات النشر: MDPI AG, 2022.
سنة النشر: 2022
المجموعة: LCC:Technology
LCC:Engineering (General). Civil engineering (General)
LCC:Biology (General)
LCC:Physics
LCC:Chemistry
مصطلحات موضوعية: magnetic nanoparticles, metal nanoparticles, hydrogen reduction, magnetic materials, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
الوصف: Cobalt ferrite nanoparticles of different stoichiometries synthesized by a sol–gel autocombustion method were used as a starting material to obtain high-moment Fe50Co50 and Fe66Co34 metal nanoparticles by topochemical hydrogen reduction. Structural and magnetic investigations confirmed the formation of FeCo nanoparticles with crystallite sizes of about 30 nm and magnetization at 0.5 T of ~265 Am2/kg (0 K), which was larger than the expected bulk value, likely because of the incorporation in the body-centered cubic (bcc) FeCo structure of the residual C atoms present on the surface of the oxide particles. Temperature-dependent magnetization measurements in the H2 atmosphere were also performed to investigate in detail the reduction mechanism and the effect of an external magnetic field on the process efficiency.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2076-3417
Relation: https://www.mdpi.com/2076-3417/12/4/1899; https://doaj.org/toc/2076-3417
DOI: 10.3390/app12041899
URL الوصول: https://doaj.org/article/09d89ae301f647b7a56067c308183e67
رقم الأكسشن: edsdoj.09d89ae301f647b7a56067c308183e67
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:20763417
DOI:10.3390/app12041899