dc.contributor.author | Telling, N.D. | en_GB |
dc.contributor.author | Keatley, Paul Steven | en_GB |
dc.contributor.author | van der Laan, Gerrit | en_GB |
dc.contributor.author | Hicken, R.J. | en_GB |
dc.contributor.author | Arenholz, E. | en_GB |
dc.contributor.author | Sakuraba, Y. | en_GB |
dc.contributor.author | Oogane, M. | en_GB |
dc.contributor.author | Ando, Y. | en_GB |
dc.contributor.author | Takanashi, K. | en_GB |
dc.contributor.author | Sakuma, A. | en_GB |
dc.contributor.author | Miyazaki, T. | en_GB |
dc.date.accessioned | 2013-01-11T14:59:29Z | en_GB |
dc.date.accessioned | 2013-03-20T13:08:04Z | |
dc.date.issued | 2008-11-25 | en_GB |
dc.description.abstract | We examine the formation of local moments in Heusler alloys of the composition Co(2)MnZ (where Z=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 Co2MnSi (CMS) and Co2MnAl 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. | en_GB |
dc.identifier.citation | Vol. 78 (18), article 184438 | en_GB |
dc.identifier.doi | 10.1103/PhysRevB.78.184438 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10036/4154 | en_GB |
dc.language.iso | en | en_GB |
dc.publisher | American Physical Society | en_GB |
dc.subject | magnetic circular dichroism | en_GB |
dc.subject | absorption spectra | en_GB |
dc.title | Evidence of local moment formation in Co-based Heusler alloys | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2013-01-11T14:59:29Z | en_GB |
dc.date.available | 2013-03-20T13:08:04Z | |
dc.identifier.issn | 1098-0121 | en_GB |
exeter.article-number | 184438 | en_GB |
dc.description | Copyright © 2008 The American Physical Society | en_GB |
dc.identifier.eissn | 1550-235X | en_GB |
dc.identifier.journal | Physical Review B - Condensed Matter and Materials Physics | en_GB |