Defects-driven appearance of half-metallic ferrimagnetism in Co–Mn-based Heusler alloys

Ferrimagnetism and antiferromagnetism in half-metallic Heusler alloys

Iosif Galanakis∗1, Kemal Özdoğan2, Ersoy Şaşıoğlu3,4, and Bekir Aktaş2 1 Department of Materials Science, University of Patras, GR-26504 Patra, Greece 2 Department of Physics, Gebze Institute of Technology, Gebze, 41400, Kocaeli, Turkey 3 Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany 4 Fatih University, Physics Department, 34500, Büyükçekmece, İstanbul, Turkey

Half-metallic Co-based quaternary Heusler alloys for spintronics: Defect- and pressure-induced transitions and properties

Tunnel magnetoresistance effect and magnetic damping in half-metallic Heusler alloys.

Some full-Heusler alloys, such as Co(2)MnSi and Co(2)MnGe, are expected to be half-metallic ferromagnetic material, which has complete spin polarization. They are the most promising materials for realizing half-metallicity at room temperature owing to their high Curie temperature. We demonstrate a huge tunnel magnetoresistance effect in a magnetic tunnel junction using a Co(2)MnSi Heusler alloy...

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

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 resu...

Introduction to half - metallic Heusler alloys : Electronic Structure and Magnetic Properties

Intermetallic Heusler alloys are amongst the most attractive half-metallic systems due to the high Curie temperatures and the structural similarity to the binary semiconductors. In this review we present an overview of the basic electronic and magnetic properties of both Heusler families: the so-called half-Heusler alloys like NiMnSb and the the full-Heusler alloys like Co 2 MnGe. Ab-initio res...