Blocking Temperature of Magnetite Nanoparticles Fe₃O₄ Encapsulated Silicon Dioxide SiO₂

Abstract:

One of the important characteristics of magnetic materials is the measurement of magnetic characteristics through Superconducting Quantum Interference Device (SQUID) especially magnetization temperature dependence M(T)_ZFC and MT_FC measurement. In this work, we reported magnetization temperature dependence measurements of magnetite nanoparticles without SiO₂ encapsulation (Fe₃O₄) and magnetite nanoparticles with SiO₂ encapsulation (Fe₃O₄.SiO₂) at the application of magnetic fields of 100 Oe. The nanoparticles magnetite was synthesized by co-precipitation method. It was calculated that the blocking temperature of magnetite nanoparticles Fe₃O₄ without and with SiO₂ encapsulation is 118.38 K and 209.03 K, respectively. The blocking temperatures of magnetic nanoparticles increase by SiO₂ encapsulation.

• Periodical: Key Engineering Materials (Volume 855)
• Pages: 172-176
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.855.172
• Online since: July 2020
• Authors: Togar Saragi*, Hotmas D. Sinaga, Feni Rahmi, Gustiani A. Pramesti, Adi Sugiarto, Arnold Therigan, Norman Syakir, Sahrul Hidayat, Risdiana Risdiana
• Keywords: Blocking Temperature, Co-Precipitation, FC, Magnetite, Nanoparticles, SiO₂, ZFC

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