Role of Gd 5d-Au 5d hybridization for the magnetic properties of Au-Al-Gd quasicrystal approximants
Abstract
We have studied the electronic states of magnetic Au-Al-Gd quasicrystal approximants, which exhibit different magnetic ground states at low temperatures, by orbital-selective soft and hard x-ray electron spectroscopies in the paramagnetic phase. Our results reveal that the valence electronic states vary among the Au-Al-Gd approximants with different magnetic ground states, whereas the Gd 4f electrons are localized in all of them. In particular, we find that the Gd 5d states are hybridized with the Au 5d states around the Fermi level, providing information about a local pathway for the intersite exchange interaction between the localized Gd 4f electrons. This hybridization strength varies among these samples. Our findings bring an orbital-resolved microscopic picture to the magnetism of rare-earth-based quasicrystals and approximants.
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BibTeX
@misc{nozue2026role,
title = {{Role of Gd 5d-Au 5d hybridization for the magnetic properties of Au-Al-Gd quasicrystal approximants}},
author = {Goro Nozue and Hidenori Fujiwara and Satoru Hamamoto and Yuto Torii and Mai Sakaguchi and Sho Nakajima and Takuya D. Nakamura and Nonoka U. Sakamoto and Takayuki Kiss and Masaki Oura and Akira Yasui and Kotaro Higashi and Naomi Kawamura and Kojiro Mimura and Arata Tanaka and Asuka Ishikawa and Farid Labib and Shintaro Suzuki and Takafumi D. Yamamoto and Ryuji Tamura and Akira Sekiyama},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.19727},
eprint = {2610.19727},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.19727},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Role of Gd 5d-Au 5d hybridization for the magnetic properties of Au-Al-Gd quasicrystal approximants
AU - Goro Nozue
AU - Hidenori Fujiwara
AU - Satoru Hamamoto
AU - Yuto Torii
AU - Mai Sakaguchi
AU - Sho Nakajima
AU - Takuya D. Nakamura
AU - Nonoka U. Sakamoto
AU - Takayuki Kiss
AU - Masaki Oura
AU - Akira Yasui
AU - Kotaro Higashi
AU - Naomi Kawamura
AU - Kojiro Mimura
AU - Arata Tanaka
AU - Asuka Ishikawa
AU - Farid Labib
AU - Shintaro Suzuki
AU - Takafumi D. Yamamoto
AU - Ryuji Tamura
AU - Akira Sekiyama
PY - 2026
DA - 2026/10/14
PB - arXiv
DO - 10.48550/arxiv.2610.19727
UR - https://arxiv.org/abs/2610.19727
AB - We have studied the electronic states of magnetic Au-Al-Gd quasicrystal approximants, which exhibit different magnetic ground states at low temperatures, by orbital-selective soft and hard x-ray electron spectroscopies in the paramagnetic phase. Our results reveal that the valence electronic states vary among the Au-Al-Gd approximants with different magnetic ground states, whereas the Gd 4f electrons are localized in all of them. In particular, we find that the Gd 5d states are hybridized with the Au 5d states around the Fermi level, providing information about a local pathway for the intersite exchange interaction between the localized Gd 4f electrons. This hybridization strength varies among these samples. Our findings bring an orbital-resolved microscopic picture to the magnetism of rare-earth-based quasicrystals and approximants.
ER -