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- W28988495 abstract "We examine the formation of local moments in Heusler alloys of the composition ${text{Co}}_{2}text{Mn}Z$ (where $Z=text{Si}$ or Al) using the combined techniques of x-ray magnetic circular and linear dichroism. The existence of local moments in half-metallic Heusler alloys is reliant upon the band gap in the minority-spin states. By utilizing the element-specific nature of x-ray absorption techniques we are able to explore the degree of localization of moments on Co and Mn atoms. We observe a crucial difference in the localization of the Co moment when comparing ${text{Co}}_{2}text{MnSi}$ (CMS) and ${text{Co}}_{2}text{MnAl}$ films that is consistent with the predicted larger minority-spin gap in the Co partial density of states for CMS. These results provide important evidence for the dominant role of the Co minority-spin states in realizing half-metallic ferromagnetism in this system." @default.
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- W28988495 date "2008-11-25" @default.
- W28988495 modified "2023-09-25" @default.
- W28988495 title "Evidence of local moment formation in Co-based Heusler alloys" @default.
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- W28988495 doi "https://doi.org/10.1103/physrevb.78.184438" @default.
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