Experimental Observation of Long-Range Magnetic Order in Icosahedral Quasicrystals

Ryuji Tamura, Asuka Ishikawa, Shintaro Suzuki, Takahiro Kotajima, Yujiro Tanaka, Takehito Seki, Naoya Shibata, Tsunetomo Yamada, Takenori Fujii, Chin Wei Wang, Maxim Avdeev, Kazuhiro Nawa, Daisuke Okuyama, Taku J. Sato

研究成果: Article査読

22 被引用数 (Scopus)


Quasicrystals (QCs), first discovered in 1984, generally do not exhibit long-range magnetic order. Here, we report on long-range magnetic order in the real icosahedral quasicrystals (i QCs) Au-Ga-Gd and Au-Ga-Tb. The Au65Ga20Gd15 i QC exhibits a ferromagnetic transition at TC = 23 K, manifested as a sharp anomaly in both magnetic susceptibility and specific heat measurements, along with an appearance of magnetic Bragg peak below TC. This is the first observation of long-range magnetic order in a real quasicrystal, in contrast to the spin-glass-like behaviors observed for the other magnetic quasicrystals found to date. Moreover, when Gd is replaced by Tb, i.e., for the Au65Ga20Tb15 i QC, a ferromagnetic behavior is still retained with TC = 16 K. Although the sharp anomaly in the specific heat observed for the Au65Ga20Gd15 i QC becomes broadened upon Tb substitution, neutron diffraction experiments clearly show marked development of magnetic Bragg peaks just below TC, indicating long-range magnetic order for the Au65Ga20Tb15 i QC also. Our findings can contribute to the further investigation of exotic magnetic orders formed on real quasiperiodic lattices with unprecedented highest global symmetry, i.e., icosahedral symmetry.

ジャーナルJournal of the American Chemical Society
出版ステータスPublished - 2021 12月 1

ASJC Scopus subject areas

  • 触媒
  • 化学 (全般)
  • 生化学
  • コロイド化学および表面化学


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