Magnetic properties of Y3AlFe4O12 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, KEff, is found to sharply rise below ∼150 K, while the saturation magnetization, Ms, changes only slightly (<20% within 3−250 K). The exchange stiffness, Aex, 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 TC≈436 K. The temperature dependence of the domain wall thickness and the critical single-domain size correlate with the corresponding values for pure Y3Fe5O12 (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.
@article{arxiv.2410.05879,
title = {Room- and low-temperature magnetic parameters of Y$_3$AlFe$_4$O$_{12}$ garnets},
author = {Vladyslav Borynskyi and Dariia Popadiuk and Anatolii Kravets and Yuliia Shlapa and Serhii Solopan and Vladislav Korenivski and Anatolii Belous and Alexandr Tovstolytkin},
journal= {arXiv preprint arXiv:2410.05879},
year = {2024}
}
Comments
16 pages, 6 figures, full-length article submitted to a journal