Crossover of magnetoresistance in the zero-gap half-metallic Heusler alloy Fe 2 CoSi

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...

Micromagnetic simulation of high-power spin-torque oscillator in half- metallic Heusler alloy spin valve nanopillar

Magnetoresistance of Half-Metallic Oxide Nanocontacts

Magnetoresistive effects R 0 -R H R H exceeding 500% are found at room temperature in a field of 7 mT in nanocontacts between Fe3O4 crystallites. The shape of the I V curve depends on field and the magnitude of the magnetoresistance is correlated with the resistance, the largest effects occurring when R . 100 kV. The explanation proposed involves hopping transport of spin-polarized electrons th...

Heusler alloy showing room temperature half - metallicity at the surface

In this article we investigate the surface spin polarization in a 100 nm Co 2 Cr 0.6 Fe 0.4 Al (CCFA) film grown ex situ epitaxially on MgO(100) with a 10 nm Fe buffer layer by means of spin resolved photoemission. We show that a careful in situ preparation of the sample surface leads to values for the room temperature spin polarization up to 45% at the Fermi level. To our knowledge, this is th...

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