Abstract
The magnetic moment of epitaxial Co100−xMnx films grown on MgO(001) at low Mn concentration region diverging from Slater-Pauling curve is investigated. We grew Co100−xMnx (0 ≤ x ≤ 30) on MgO(001) substrates by molecular beam epitaxy and measured their structural and magnetic properties. Our results reveal the moment diverging from Slater-Pauling curve of Co100−xMnx films grown on MgO(001) at low Mn concentration is due to a structure transition. Anomalous Hall effect (AHE) study of Co90Mn10 films with different crystal structure confirmed this relation between magnetism and structure, the intrinsic part of AHE clearly shows the competition between different phases. Our quantitative analysis has made a further understanding of the moment diverging from Slater-Pauling curve found in Co100−xMnx films at low Mn concentration.
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