Probing local magnetic cluster development in (CuZr)93−xAl7Gdx bulk metallic glasses by 27Al NMR

► NMR and magnetization experiments used to study Gd-bearing metallic glasses. ► Non-linear NMR linewidth caused by a magnetic susceptibility distribution. ► Development of magnetic short-range order at high temperatures. ► Magnetic short-range order anti-ferromagnetic and frustrated. ► Gd-bearing metallic glasses paramagnetic at low temperatures.