Metamagnetic transitions in Ba2LnFeO5 (Ln = Tb, Dy, Ho, Yb): Spin-flip processes in single or dual easy-axis systemsRemoveV. Hardy, F. Guillou, V. Caignaert, F. Veillon, Y. Bréard, B. Raveau, F. Wilhelm, A. Rogalev, and B. GonanoPhys. Rev. Materials 10, 054409 (2026)