Valence Electronic States of Magnetic Au-Al-Tb Quasicrystal Approximants Studied by Soft and Hard X-ray Electron Spectroscopies

We have investigated the electronic states of Au-Al-Tb quasicrystal approximants (ACs), which exhibit different magnetic ground states at low temperatures, by high-energy electron spectroscopies in the paramagnetic phase. The Tb M4,5-edge x-ray absorption and the Tb 3d-edge resonant photoemission spectroscopy (RPES) have revealed the dominant Tb3+ state with the localized 4f electrons in all samples. In addition, the hybridization between Tb 4f and 5d orbitals just below the Fermi level has been observed in the Tb 3d-edge RPES. By using the Tb L3-edge high-energy-resolution fluorescence-detected x-ray absorption spectroscopy, the different Tb 5d electronic states have been verified among the Au-Al-Tb ACs. This variation of Tb 5d states would affect the difference in the magnetic ground states of the Au-Al-Tb ACs.

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Publication Details

Journal
MATERIALS TRANSACTIONS
Published
2026-04-24
DOI
https://doi.org/10.2320/matertrans.mt-md2025005
Primary Topic
Quasicrystal Structures and Properties
Type
article
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article

Valence Electronic States of Magnetic Au-Al-Tb Quasicrystal Approximants Studied by Soft and Hard X-ray Electron Spectroscopies

Masaki Oura, Takafumi D. Yamamoto, Goro Nozue, Asuka Ishikawa et al.
MATERIALS TRANSACTIONS
Quasicrystal Structures and Properties
article

Valence Electronic States of Magnetic Au-Al-Tb Quasicrystal Approximants Studied by Soft and Hard X-ray Electron Spectroscopies

Masaki Oura, Takafumi D. Yamamoto, Goro Nozue, Asuka Ishikawa, Yuto Torii, A. Tanaka, Mai Sakaguchi, Satoru Hamamoto, T Nakamura, Kojiro Mimura, A. Sekiyama, Kotaro Higashi, H. Fujiwara, Takayuki Kiss, Ryuji Tamura, Nonoka U. Sakamoto, Naomi Kawamura
article en

Abstract

We have investigated the electronic states of Au-Al-Tb quasicrystal approximants (ACs), which exhibit different magnetic ground states at low temperatures, by high-energy electron spectroscopies in the paramagnetic phase. The Tb M4,5-edge x-ray absorption and the Tb 3d-edge resonant photoemission spectroscopy (RPES) have revealed the dominant Tb3+ state with the localized 4f electrons in all samples. In addition, the hybridization between Tb 4f and 5d orbitals just below the Fermi level has been observed in the Tb 3d-edge RPES. By using the Tb L3-edge high-energy-resolution fluorescence-detected x-ray absorption spectroscopy, the different Tb 5d electronic states have been verified among the Au-Al-Tb ACs. This variation of Tb 5d states would affect the difference in the magnetic ground states of the Au-Al-Tb ACs.

MATERIALS TRANSACTIONSVol. 67(5)
Hiroshima University (JP), Tokyo University of Science (JP), SPring-8 (JP), Japan Synchrotron Radiation Research Institute (JP), Spintronics Research Network of Japan (JP), Osaka Metropolitan University (JP), The University of Osaka (JP)
Openalex Percentile: Top 15%
Quasicrystal Structures and Properties
DOISourceOpenAlex
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