2025/04/14 by Akihiko Ikeda, Yuya Kubota, Ikeda, Akihiko +39 · 6 citations
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Electronic and Structural Properties of Oxides #Magnetic properties of thin films
paper · pdf · doi:10.48550/arxiv.2504.10085
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 μ-seconds 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, β-O2, by combining the single-shot diffraction of x-ray free-electron laser (XFEL) and the newly developed portable 100 T generator (PINK-02). The very soft and anisotropic response of β-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.