Direct evidence for a half-metallic ferromagnet

Half-metallic graphene nanoribbons

“…Such asymmetric electronic states for the different spins have been predicted for some ferromagnetic metals−for example, the Heusler compounds 1 −and were first observed in a manganese perovskite 2 . In view of the potential for use of this property in realizing spin-based electronics, substantial efforts have been made to search for half-metallic materials 3,4 .…”

Magnons in ferromagnetic metallic manganites

“…In a class of doped manganites [2] which exhibit the colossal magnetoresistance (CMR) effect [3]-the extremely large drop in resistivity induced by application of a magnetic field near the Curie temperature (T C ), the FM metallic state has been suggested theoretically [4] and experimentally [5] as a possible halfmetallic state.…”

Intrinsic and precipitate-induced quantum corrections to conductivity in La2/3Sr1/3MnOGao1, Cao2, Zhang3 et al. 2012Phys. Rev. B

“…LSMO was chosen because of its characteristic ferromagnetic metallic phase with a temperature-induced metal-insulator transition and half-metallic conductivity. [22][23][24] By controlling the concentration of non-magnetic ZrO 2 , one can investigate the disorder effect of non-magnetic particles without changing the spin condition of the matrix. By means of a detailed analysis of the resistivity as a function of magnetic field, temperature and density of non-magnetic ZrO 2 particles, the origin of resistivity minima is found to be in good agreement with a combination of the theory of 3D weak localization and electron-electron interaction in the metallic LSMO system with non-magnetic disorder.…”