A new diluted magnetic semiconductor: The half-metallic ferromagnet CoTi1−xFexSb

Ferromagnet-Insulator-Ferromagnet Tunneling with One Half-Metallic Electrode

Ferromagnet-insulator-Ferromagnet (FM-I-FM) tunnel junctions were prepared with one ferromagnet being NiMnSb, a compound predicted by deGroot et al. to be half-metallic. X-ray diffraction and Rutherford back scattering experiments indicated that the deposited NiMnSb exhibited the desired structure and composition. However, a junction magnetoresistance (JMR) of only 1.5% at room temperature and ...

Organometallic benzene-vanadium wire: A one-dimensional half-metallic ferromagnet.

Using density functional theory we perform theoretical investigations of the electronic properties of a freestanding one-dimensional organometallic vanadium-benzene wire. This system represents the limiting case of multidecker Vn(C6H6)(n+1) clusters which can be synthesized with established methods. We predict that the ground state of the wire is a 100% spin-polarized ferromagnet (half-metal). ...

Role of stoichiometric and nonstoichiometric defects on the magnetic properties of the half-metallic ferromagnet NiMnSb

The first material to be predicted from first-principles calculations as half-metallic was NiMnSb, and the research on this material has been intense due to its possible applications in spintronics devices. The failure of many experiments to measure spin polarization to more than a fraction of the predicted 100% has partly been blamed on structural defects. In this work a complete first-princip...

Low temperature resistivity in a nearly half-metallic ferromagnet

We consider electron transport in a nearly half-metallic ferromagnet, in which the minority spin electrons close to the band edge at the Fermi energy are Anderson-localized due to disorder. For the case of spin-flip scattering of the conduction electrons due to the absorption and emission of magnons, the Boltzmann equation is exactly soluble to the linear order. From this solution we calculate ...

Nonquasiparticle states in the half-metallic ferromagnet NiMnSb