By measuring the prototypical antiferromagnet α-Fe2O3, we show that it is possible to determine the
static spin orientation and dynamic spin correlations within nanometers from an antiferromagnetic surface
using the nuclear spin polarization of implanted 8Liþ ions detected with β-NMR. Remarkably, the firstorder
Morin spin reorientation in single crystal α-Fe2O3 occurs at the same temperature at all depths
between 1 and 100 nm from the (110) surface; however, the implanted nuclear spin experiences an
increased 1=T1 relaxation rate at shallow depths revealing soft-surface magnons. The surface-localized
dynamics decay towards the bulk with a characteristic length of ϵ ¼ 11 1 nm, closely matching the
finite-size thresholds of hematite nanostructures.