Room- and low-temperature magnetic parameters of Y$_3$AlFe$_4$O$_{12}$ garnets
| Autor: | Borynskyi, Vladyslav, Popadiuk, Dariia, Kravets, Anatolii, Shlapa, Yuliia, Solopan, Serhii, Korenivski, Vladislav, Belous, Anatolii, Tovstolytkin, Alexandr |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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. Comment: 16 pages, 6 figures, full-length article submitted to a journal |
| Databáze: | arXiv |
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