Novel Magnetic Domain Structure in Iron Meteorite Induced by the Presence of L10-FeNi

High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, JapanReceived October 22, 2009; accepted November 24, 2009; published online December 18, 2009Photoelectron emission microscopy has been carried out to study the magnetic properties of iron meteorite associated with the Widmansta¨ttenstructure for the first time. A magnetic circular dichroic image reveals a unique magnetic domain structure, resulting in the ‘‘head-on’’ magneticcoupling over the interface between the and lamellae. Such a magnetic domain structure is unfavorable in any synthetic Fe–Ni alloys.Micromagnetics simulation reasonably explains that the formation of magnetic domains is induced by the L1