Synthesis and magnetic properties of ε-AlxFe2-xO3 nanoparticles
Source abstract
Abstract
ε-Al xFe 2-xO 3 (x = 0, 0.125, 0.167, 0.222 and 0.4) nanoparticles were manufactured by a new kind of mesoporous template-compacted fumed silica. The effect of Al 3+ composition on the purity and magnetic performances of the ε-Al xFe 2-xO 3 samples were investigated. The structural and magnetic performances of the samples were characterized by X-ray diffraction, transmission electron microscope and SQUID magnetometer. The results indicate that the doping of Al 3+ can decrease the dimension of ε-Fe 2O 3 nanoparticles and effectively reduce the formation of α-Fe 2O 3 impurity in the samples. And the magnetic phase transition temperature of the ε-Al xFe 2-xO 3 samples decreases with the increase of Al 3+. And the low temperature magnetic phase transition finally vanishes at x = 0.222. The ε-Al xFe 2-xO 3 samples exhibit large coercivity. With the increase of Al 3+ content, the coercivity of ε-Al xFe 2-xO 3 increases firstly to a maximum and then decreases.
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Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Iron oxide chemistry and applications · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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