Reorientation phase transition behavior in metastable epitaxial cobalt-copper alloys

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Abstract
We report experimental results on the ferromagnetic critical behavior of cobalt and metastable cobalt‐copper alloy two‐dimensional layers Cu x Co1−x epitaxially grown on Cu(001). Copperalloying reduces the magnitude of the cobalt magnetic moment and introduces a magnetization component normal to the film. Reorientation of the magnetization back into the plane occurs via a second‐order phase transition at a temperature which is lower than the filmCurie temperature. We discuss these results in light of the recent predictions of Pescia and Pokrovsky.