The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 10 2 2019 11 26 Coherent quantum trasport in ferromagnet-superconductor-ferromagnet graphene junctions Coherent quantum trasport in ferromagnet-superconductor-ferromagnet graphene junctions 135 139 868 FA M Salehi GH Rashedi Journal Article 2019 11 26 In this paper, we investigate the coherent quantum transport in grapheme-based ferromagnet-superconductor-ferromagent junctions within the framework of BCS theory using DBdG quasiparticles equation .The coherency with the finite size of superconductor region has two characteristic features subgap electron transport and oscillations of differential conductance. we show that periodic vanishing of the Andreev reflection at the energies called geometrical resonances above the superconducting gap is a striking consequence of quasiparticles interference. We suggest to make devices that produce polarized spin-current with possible applications in spintronics. In this paper, we investigate the coherent quantum transport in grapheme-based ferromagnet-superconductor-ferromagent junctions within the framework of BCS theory using DBdG quasiparticles equation .The coherency with the finite size of superconductor region has two characteristic features subgap electron transport and oscillations of differential conductance. we show that periodic vanishing of the Andreev reflection at the energies called geometrical resonances above the superconducting gap is a striking consequence of quasiparticles interference. We suggest to make devices that produce polarized spin-current with possible applications in spintronics. https://ijpr.iut.ac.ir/article_868_dd45045f8c68db9f54e70c67048d32e8.pdf