Presentation Information
[P1-71]Characterization of rare earth garnet [Eu3Fe5O12/Tb3Fe5O12]/Gd3Ga5O12 (111) ([EuIG/TbIG]/GGG (111)) thin films
*Ko-Wei Lin1, Guan-Hua Lu1, Tai-Yi Chiu1, Chi Wah Leung2 (1. National Chung Hsing University (Taiwan), 2. The Hong Kong Polytechnic University (China))
Keywords:
rare-earth ion garnets thin films
The rare-earth ion garnets (ReIG) thin films have been studied recently due to potential applications in spintronics [1]. The hysteresis behavior was found in ReIG thin films with perpendicular magnetic anisotropy (PMA) through the anomalous Hall effect resistance (RAHE) of the ferromagnetic/heavy metal (FMI/HM) system. We have shown in our previous works where first, the advanced technology for example polarized neutron reflectometry (PNR) was used to study the magnetic proximity behavior at interfaces of Pt/TbIG/GGG (111) thin films [2]. Second, the tunable compensation temperature (Tcomp.) was achieved in the Pt/EuIG/TbIG/GGG (111) thin film system with different EuIG thicknesses [3]. To this end, microstructures and chemical composition and/or oxidation states of the ReIG thin films play important roles in affecting the respected magnetic properties. In this study, microstructures and oxidation states of the EuIG/TbIG/GGG (111) thin film using PLD technique were investigated. Results obtained by field-emission transmission electron microscopy (FE-TEM) indicate that an epitaxial growth (with an in-plane compressive strain) was found in a EuIG(20 nm)/TbIG(30 nm) thin film deposited on GGG (111) single crystal substrates, in agreement with those characterized by XRD. In addition, results characterized by X-ray photoelectron spectroscopy (XPS) indicate that the EuIG/TbIG thin film consisted of Eu3+ and Tb3+ in the EuIG and TbIG layer, respectively. The peak shift as well as peak intensity variations in the Fe spectra imply that the changes in Fe valence and oxygen vacancies may be presence in the EuIG/TbIG thin film.
Research was supported by NSC, Taiwan and Hong Kong Research Grants Council.
[1] E. R. Rosenberg et al., Phys. Rev. Mater 2, 094405 (2018).
[2] R. Yadav et al., Phys. Rev. Mater 7, 124407 (2023).
[3] P. G. Li et al., J. Magn. Magn. Mater 592, 171785 (2024).
Research was supported by NSC, Taiwan and Hong Kong Research Grants Council.
[1] E. R. Rosenberg et al., Phys. Rev. Mater 2, 094405 (2018).
[2] R. Yadav et al., Phys. Rev. Mater 7, 124407 (2023).
[3] P. G. Li et al., J. Magn. Magn. Mater 592, 171785 (2024).