"Superlong-range magnetic coupling and ferromagnetic spin freezing in mechanoluminescent semiconductor Eu:SrAl₂O₄", X.-G. Zheng, I. Yamauchi, T. Galica, E. Nishibori, T. Kawae, J. G. Nakamura, A. Koda, and C.-N. Xu, Adv. Sci. 2025 (2025) e09474.