Abstract

A sequence of three distinct magnetic phases of Fe are found for growth on both fcc Co(001) and Ni(001) using x-ray magnetic circular dichroism. For Fe coverages below 5 ML the films are ferromagnetic, with the magnetic moments aligned perpendicular to the surface for growth on Ni and parallel to the surface for growth on Co. Between 5 and 11 ML the Fe films are nonferromagnetic at room temperature. Above 11 ML the Fe films are once again ferromagnetic. An identical sequence of magnetic phase transitions is known to occur for Fe growth on Cu(001). Based on this comparison and on the nearly identical lateral lattice constants of fcc Co, Ni, and Cu, we conclude that Fe growth on fcc Co(001) and Ni(001) follows the same sequence of crystalline phase transitions as Fe growth on Cu(001).

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