Magnetism

Synthesis and magnetic properties of zinc-tellurite glasses activated by magnetite nanoparticles

M. V. Shestakov^a, I. I. Makoed^b, V. V. Moshchalkov<sup>c

a</sup> Russian State Agrarian University - Moscow Agricultural Academy after K.A. Timiryazev, Moscow, Russia
^b A. S. Pushkin Brest State University, Brest, Belarus
^c Katholieke Universiteit Leuven, Leuven, Belgium

Abstract: An effect of activation with nanosized particles Fe$_3$O$_4$ on structural and magnetic properties of zinc-tellurite glasses 20$\cdot$ZnO–(80–$x$) $\cdot$ TeO$_2$–$x\cdot$Fe$_3$O$_4$ ($x$ = 0, 1, 3, 7), prepared with melt-quenching method, have been investigated. Some functional properties of the glasses were experimentally investigated with X-ray diffraction, Energy dispersive and Raman spectroscopies, and SQUID magnetometry. The values of the average crystallite sizes calculated with Scherer and Williamson–Hall methods were comparable with the sizes of magnetically active clusters reconstructed from the results of processing of the magnetic field dependences of the values of specific magnetizations, indicating their effect on the change in the magnetic properties of activated glasses. A partial phase transformation, caused by oxidation of Fe$^{2+}$ into Fe$^{3+}$ ions, of ferrimagnetic magnetite Fe$_3$O$_4$ into paramagnetic maghemite $\gamma$-Fe$_2$O$_3$ has been revealed.

Keywords: glass, glass-ceramics, nanoparticle, magnetite, magnetism.

Received: 16.03.2023
Revised: 16.03.2023
Accepted: 17.03.2023

DOI: 10.21883/FTT.2023.05.55498.36

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