  While spin textures in materials exhibiting zero net magnetization, such as
antiferromagnetic domain walls (DWs), have attracted much interest lately due
to their robustness against external magnetic noise, their generic detection
via conventional magnetometry remains a challenging task. Here, we propose
quantum relaxometry as a new route to image spin textures by probing the
collective spin modes harbored by them. We investigate the Goldstone modes
hosted by an antiferromagnetic domain wall and assess the relaxation rate of a
quantum-spin sensor interacting with them. We show that such modes can be
detected via relaxometry in some common antiferromagnets. Moreover, based on
symmetry considerations, we propose a simple protocol to probe the individual
dynamics of each mode.
