2025-10-29 電気通信大学
図１：ポータブル110テスラ発生装置PINK-02の概要とXFEL施設SACLAでの破壊型パルス磁場実験の様子
＜関連情報＞
- https://www.uec.ac.jp/news/newsrelease/2025/20251029_7258.html
- https://www.uec.ac.jp/about/publicity/news_release/2025/pdf/20251029_7258.pdf
- https://journals.aps.org/prl/abstract/10.1103/r7br-qnrn
X線自由電子レーザーによる巨大異方性磁歪の観測−O2110テスラで X-Ray Free-Electron Laser Observation of Giant and Anisotropic Magnetostriction in −O2 at 110 Tesla
Akihiko Ikeda, Yuya Kubota, Yuto Ishii, Xuguang Zhou, Shiyue Peng, Hiroaki Hayashi, Yasuhiro H. Matsuda, Kosuke Noda, Tomoya Tanaka et al.
Physical Review Letters Published: 28 October, 2025
DOI: https://doi.org/10.1103/r7br-qnrn
Abstract
In strong magnetic fields beyond 100 T, the significant Zeeman energy competes with the lattice interactions, where a considerable magnetostriction is expected. However, the microscopic observation of the magnetostriction above 100 T has been hindered due to the short pulse duration of microseconds and the coil’s destruction. Here, we report the observation of the giant and anisotropic magnetostriction of ∼1% at 110 T in the spin-controlled crystal −O2 by combining the single-shot diffraction of an x-ray free-electron laser (XFEL) and the newly developed portable 100 T generator (PINK-02). The soft and anisotropic response of −O2 should originate in the competing van der Waals force and exchange interaction and also the frustration of spin and lattice on the triangular network. The XFEL experiment above 100 T using PINK-02 enables microscopic investigations on materials’ properties at high magnetic fields, providing insights into how spins contribute to the stability of crystal structures.
