“…Within each domain, the magnetization is saturated, but its direction in neighboring domains is different. The domain structure [27] can be imaged using Bitter patterns, optically using Faraday or Kerr rotation, XMCD photoemission electron microscopy (PEEM) [28,29] or, more recently, magnetic force microscopy (MFM) [30,31]. Similarly, upon cooling below the Néel temperature, AF domains emerge.…”