Role of defects and disorder in the half-metallic full-Heusler compounds

Details Role of defects and disorder in the half-metallic full-Heusler compounds Role of defects and disorder in the half-metallic full-Heusler compounds

2007-09-26

arxiv.org/abs/0709.4183v2

Physics

Condensed Matter

Materials Science

Chapter intended for a book with contributions of the invited speakers of the International Conference on Nanoscale Magnetism

Scientific paper

10.1007/978-3-540-69882-1_1

Half-metallic ferromagnets and especially the full-Heusler alloys containing Co are at the center of scientific research due to their potential applications in spintronics. For realistic devices it is important to control accurately the creation of defects in these alloys. We review some of our late results on the role of defects and impurities in these compounds. More precisely we present results for the following cases (i) doping and disorder in Co$_2$Cr(Mn)Al(Si) alloys, (ii) half-metallic ferrimagnetism appeared due to the creation of Cr(Mn) antisites in these alloys, (iii) Co-doping in Mn$_2$VAl(Si) alloys leading to half-metallic antiferromagnetism, and finally (iv) the occurrence of vacancies in the full-Heusler alloys containing Co and Mn. These results are susceptible of encouraging further theoretical and experimental research in the properties of these compounds.

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