Room- and low-temperature magnetic parameters of Y$_3$AlFe$_4$O$_{12}$ garnets

Vladyslav Borynskyi; Dariia Popadiuk; Anatolii Kravets; Yuliia Shlapa; Serhii Solopan; Vladislav Korenivski; Anatolii Belous; Alexandr Tovstolytkin

arXiv · 2410.05879

Room- and low-temperature magnetic parameters of Y$_3$AlFe$_4$O$_{12}$ garnets

Vladyslav Borynskyi·Dariia Popadiuk·Anatolii Kravets·Yuliia Shlapa·Serhii Solopan·Vladislav Korenivski·Anatolii Belous·Alexandr Tovstolytkin

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Abstract

Magnetic properties of Y$_3$AlFe$_4$O$_{12}$ garnet ceramics have been studied over a wide range of temperature ($3-370$ K) and magnetic fields (up to $2$ kOe). Effects of varying the temperature on some of the application-specific magnetic characteristics have been analyzed in detail. With the decrease in temperature, the effective anisotropy constant, $K_{Eff}$, is found to sharply rise below $\sim150$ K, while the saturation magnetization, $M_s$, changes only slightly ($<20\%$ within $3-250$ K). The exchange stiffness, $A_{ex}$, and spin wave stiffness, $D$, parameters mirror the relatively smooth behavior of the magnetization at low temperatures but display a rapid drop when $T$ approaches $T_C\approx436$ K. The temperature dependence of the domain wall thickness and the critical single-domain size correlate with the corresponding values for pure Y$_3$Fe$_5$O$_{12}$ (YIG) and are in agreement with the theoretical estimates. We conclude by discussing the ways of how to use the obtained results for tailoring the magnetic properties of YIG-based materials for technological applications.

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Vladyslav Borynskyi, Dariia Popadiuk, Anatolii Kravets, Yuliia Shlapa, Serhii Solopan, Vladislav Korenivski, Anatolii Belous, Alexandr Tovstolytkin. 2024-10-08. Room- and low-temperature magnetic parameters of Y$_3$AlFe$_4$O$_{12}$ garnets. https://arxiv.org/abs/2410.05879

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