Giant spontaneous exchange bias obtained by tuning magnetic compensation in samarium ferrite single crystals.

Spontaneous exchange bias (SEB) under zero field cooling (ZFC) has recently attracted lots of attention due to its underlying physics and potential applications. Here we report the giant SEB (GSEB) of SmFeO single crystals by tuning magnetic compensation by temperature, which is rather convenient. A SEB field of up to 1 T at 3.