Unravelling the origin of ferromagnetism and critical scaling behavior in orbital altermagnetic candidate CuBr 2 derived lead free Ruddlesden–Popper halide perovskite (PEA) 2 CuBr 4. - Routh, Sayan; Patel, Shubham; Debnath, Tuhin; Mitra, Saikat; Nandy, Snehasish; Chowdhury, Avijit (Nanotechnology, 2026)